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8.2

SDL Render Problems w/ Visual Studio .net 2003

Asked by dx100 in 3D Game Programming, Microsoft Visual C++, OpenGL Graphics & Game Programming

Tags: sdl, visual, studio

When initialising, nothing displays on the screen, it goes black for about 1 second then parts of visual studio show through and thats it. Any ideas?

Here's the code ;
   
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#include <windows.h>
#include <gl/gl.h>
#include <gl/glu.h>
#include <sdl/sdl.h>


#define PI 3.141592654

// Pre-define some colour triplets
float colours[7][3] = {
      0.5, 0.5, 0.5,      /*  Red            */
      0.5, 0.5, 0.5,      /*  Green      */
      0.5, 0.5, 0.5,      /*  Blue      */
      0.5, 0.5, 0.5,      /*  Yellow      */
      0.5, 0.5, 0.5,      /*  Magenta      */
      0.5, 0.5, 0.5,      /*  Cyan      */
      0.5, 0.5, 0.5,      /*  White      */
};

static  SDL_Surface *gScreen;      /* A pointer to the video screen */
GLuint  smallDot;                        /* An identifier for the GL description of a single dot */

/* Dot & Display parameters */
double      dotX[500], dotY[500], dotLifeL[500];
double      dotXR[500], dotYR[500], dotLifeR[500];
double  dotDirectionL[500];
double  dotDirectionR[500];
int            NumberOfDotsBase = 200;    //This is the TOTAL number of dots - signal+noise.
int            NumberOfRandomDotsBase = 100;  //This is the number of random dots in the display. Subtract this from the int above to int
//int            NumberOfRandomDotsBaseL = 100;  //This is the number of random dots in the L display. ADDED Poss need to add? PC  
//int            NumberOfRandomDotsBaseR = 100;  //This is the number of random dots in the R display. ADDED Poss need to add? PC
int            NumberOfDotsInc = 200;    //This is the TOTAL number of dots - signal+noise.
int            NumberOfRandomDotsInc = 60;  //This is the number of random dots in the display. Subtract this from the int above to int
int            NumberOfRandomDotsIncR = 60;  //This is the number of random dots in the display. Subtract this from the int above to int ADDED PC            
int            NumberOfDotsDec = 200;    //This is the TOTAL number of dots - signal+noise.

int            NumberOfRandomDotsDec = 140;  //This is the number of random dots in the display. Subtract this from the int above to int
int            DotLifetime = 10;
float   DotSpeed = 15;
int            MaxStimulusRadius = 230;      // Controls size of drawing area
int            fps = 75;
double  centerX = 1024/2;
double  centerY = 768/2;
double  centerX_L = 200;
double  centerY_L = 768/2;
double  centerX_R = 800;
double  centerY_R = 768/2;
double  phi = PI;
double  SPOT_PHI_DELTA = 0.026667;
int            fixCol = 0;

/* fMRI design parameters */
int            numBlocks = 1;            // 1 block = 2 trials (ie S1-S2, S1-S1)

float      S1length = 1.5;
float      ISI = 0.0;
float      S2length = 1.5;
float      ITI2 = 2.0;
float      ITI3 = 3.0;
float      ITI4 = 4.0;
float      ITI5 = 5.0;
float      ITI6 = 6.0;
float      ITI7 = 7.0;
float      ITI8 = 8.0;
float      ITI9 = 9.0;
float      ITI10 = 10.0;
float      bufferlength = 10.0;

int      startStim,stopStim;

/* ============== Graphics Maintanance Functions ============== */

static void createSurface (int fullscreen)
{
    Uint32 flags = 0;
   
    // Don't set color bit sizes (SDL_GL_RED_SIZE, etc)
    //    Mac OS X will always use 8-8-8-8 ARGB for 32-bit screens and
    //    5-5-5 RGB for 16-bit screens
   
    // Request a 16-bit depth buffer (without this, there is no depth buffer)
    SDL_GL_SetAttribute (SDL_GL_DEPTH_SIZE, 16);
   
      // Request double-buffered OpenGL
    //     The fact that windows are double-buffered on Mac OS X has no effect
    //     on OpenGL double buffering.
    SDL_GL_SetAttribute (SDL_GL_DOUBLEBUFFER, 1);
            
    flags = SDL_OPENGL;
    if (fullscreen) flags |= SDL_FULLSCREEN;
   
    // Create window
    gScreen = SDL_SetVideoMode (1024, 768, 0, flags);
    if (gScreen == NULL) {            
        fprintf (stderr, "Couldn't set 1024x768 OpenGL video mode: %s\n", SDL_GetError());
            SDL_Quit();
            exit(2);
      }
}

static void initGL (int Width, int Height)
{
      glViewport(0, 0, Width, Height);
      glClearColor(0.0f, 0.0f, 0.0f, 0.0f);            // This Will Clear The Background Color To Black

      glMatrixMode(GL_PROJECTION);
      glLoadIdentity();
      gluOrtho2D(0.0f,(GLdouble)(Width),0.0f,(GLdouble)(Height));

      glMatrixMode(GL_MODELVIEW);
}

/* ============== Graphics Drawing Functions ============== */

void createDot() {
      GLint i;
      GLint circle_points = 10;
      GLfloat angle;
      GLint dot_radius = 4;      // Change this to increase/decrease size of dots
      
      /* The dot is created around 0,0 so need to translate its position */
      smallDot =glGenLists(1);
      glNewList(smallDot, GL_COMPILE);
            glColor3f(1.0f,1.0f,1.0f);
            glBegin(GL_POLYGON);
                  for (i=0; i<circle_points; i++) {
                        angle = 2*PI*i/circle_points;
                        glVertex2f(dot_radius*cos(angle), dot_radius*sin(angle));
                  }
            glEnd();
      glEndList();
}


void drawFixation(int frameNumber) {
      int newCol;
      int framesPerColour = 30;
      
      glLoadIdentity();
      if (frameNumber%framesPerColour==0) {
            newCol = rand()%7;
            glColor3f(colours[newCol][0],colours[newCol][1],colours[newCol][2]);
            fixCol = newCol;
      }
      else
            glColor3f(colours[fixCol][0],colours[fixCol][1],colours[fixCol][2]);
      glLineWidth(3.0);
      glBegin(GL_POLYGON);
            glVertex2i(504,376);
            glVertex2i(504,392);
            glVertex2i(520,392);
            glVertex2i(520,376);
      glEnd();
}

void drawIndicatorFixationL(int frameNumber) {
      int newCol;
      int framesPerColour = 30;
      
            glColor3f(1,1,1);
            glLineWidth(2.0);
            glBegin(GL_POLYGON);
            glVertex2i(504,380);
            glVertex2i(500,388);
            glVertex2i(520,388);
            glVertex2i(520,380);
      glEnd();
}



void drawIndicatorFixationR(int frameNumber) {
      int newCol;
      int framesPerColour = 30;
      
            glColor3f(1,1,1);
      glLineWidth(2.0);
      glBegin(GL_POLYGON);
            glVertex2i(504,380);
            glVertex2i(504,388);
            glVertex2i(520,388);
            glVertex2i(524,380);
      glEnd();
}




static void drawMorroneBase_RL(int frameNumber)
{
      double theta, r, delta_r, delta_theta, delta_x, delta_y;
      int j, temp;

      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
      
      for (j=0; j<NumberOfDotsBase; j++){
      

            /* Now calculate the next position of the dot */
            // tried changed to make specific to L: NumberOfRandomDotsBaseL
            if (j<NumberOfRandomDotsBase)
            {
                  delta_x = DotSpeed*cos(dotDirectionL[j]);
                  delta_y = DotSpeed*sin(dotDirectionL[j]);
                  dotX[j] += delta_x;
                  dotY[j] += delta_y;
            }
            else
            {
            theta = atan2((dotY[j]-centerY_L), (dotX[j]-centerX_L));
            r = sqrt(((dotX[j]-centerX_L)*(dotX[j]-centerX_L))+((dotY[j]-centerY_L)*(dotY[j]-centerY_L)));
            delta_r = DotSpeed*cos(phi);
            delta_theta = (DotSpeed*sin(phi))/r;
            dotX[j] = ((r+delta_r)*cos(theta+delta_theta)) + centerX_L;
            dotY[j] = ((r+delta_r)*sin(theta+delta_theta)) + centerY_L;
            }
            /* Dot drawn, so increase its life count */
            dotLifeL[j]++;
            /* And finally a series of checks on the status of the dot */
            if (dotLifeL[j]>DotLifetime) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));
                  dotLifeL[j] = rand()%DotLifetime;
            }
            if (dotX[j]>(centerX_L+MaxStimulusRadius) || dotX[j]<(centerX_L-MaxStimulusRadius)
                  || dotY[j]>(centerY_L+MaxStimulusRadius) || dotY[j]<(centerY_L-MaxStimulusRadius)) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));
            }
            /* Draw the dot */
            glLoadIdentity();
            glTranslatef(dotX[j],dotY[j],0.0f);      
            glCallList(smallDot);
            }

            
            //Still 2 loops in, so add R statements, beginnig with the first statement following clear//
            // this meanss that the theta and clear statements will be shared for both R and L//
            
            /* Now calculate the next position of the dot */
            // tried changed to make specific to R: NumberOfRandomDotsBaseR
            
            int k, tempR;
            double thetaR, rR, delta_rR, delta_thetaR, delta_xR, delta_yR;
            
            for (k=0; k<NumberOfDotsBase; k++){      


            if (k<NumberOfRandomDotsBase)
            {
                  delta_xR = DotSpeed*cos(dotDirectionR[k]);
                  delta_yR = DotSpeed*sin(dotDirectionR[k]);
                  dotXR[k] += delta_xR;
                  dotYR[k] += delta_yR;
            }
            else
            {
            thetaR = atan2((dotYR[k]-centerY_R), (dotXR[k]-centerX_R));
            rR = sqrt(((dotXR[k]-centerX_R)*(dotXR[k]-centerX_R))+((dotYR[k]-centerY_R)*(dotYR[k]-centerY_R)));
            delta_rR = DotSpeed*cos(phi);
            delta_thetaR = (DotSpeed*sin(phi))/rR;
            dotXR[k] = ((rR+delta_rR)*cos(thetaR+delta_thetaR)) + centerX_R;
            dotYR[k] = ((rR+delta_rR)*sin(thetaR+delta_thetaR)) + centerY_R;
            }
            /* Dot drawn, so increase its life count */
            dotLifeR[k]++;
            /* And finally a series of checks on the status of the dot */
            if (dotLifeR[k]>DotLifetime) {
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotXR[k] = (tempR < MaxStimulusRadius) ? (centerX_R - tempR) : (centerX_R + (tempR-MaxStimulusRadius));
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotYR[k] = (tempR < MaxStimulusRadius) ? (centerY_R - tempR) : (centerY_R + (tempR-MaxStimulusRadius));
                  dotLifeR[k] = rand()%DotLifetime;
            }
            if (dotXR[k]>(centerX_R+MaxStimulusRadius) || dotXR[k]<(centerX_R-MaxStimulusRadius)
                  || dotYR[k]>(centerY_R+MaxStimulusRadius) || dotYR[k]<(centerY_R-MaxStimulusRadius)) {
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotXR[k] = (tempR < MaxStimulusRadius) ? (centerX_R - tempR) : (centerX_R + (tempR-MaxStimulusRadius));
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotYR[k] = (tempR < MaxStimulusRadius) ? (centerY_R - tempR) : (centerY_R + (tempR-MaxStimulusRadius));
            }
            /* Draw the dot */
            glLoadIdentity();
            //glTranslatef(dotXR[k],dotYR[k],0.0f);      
            glTranslatef(dotXR[k],dotYR[k],0.0f);
            glCallList(smallDot);

            
            
      }
      /* Finished with all the dots, so update phi */
      phi = phi-(SPOT_PHI_DELTA*PI);
      if (phi <= (-1.0*PI)) phi = PI;

      /* Superimpose fixation mark */
      drawFixation(frameNumber);
}


static void drawMorroneInc_L(int frameNumber)
{
      double theta, r, delta_r, delta_theta, delta_x, delta_y;
      int j, temp;

      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
      for (j=0; j<NumberOfDotsInc; j++){

            /* Now calculate the next position of the dot */
            if (j<NumberOfRandomDotsInc)
            {
                  delta_x = DotSpeed*cos(dotDirectionL[j]);
                  delta_y = DotSpeed*sin(dotDirectionL[j]);
                  dotX[j] += delta_x;
                  dotY[j] += delta_y;
            }
            else
            {
            theta = atan2((dotY[j]-centerY_L), (dotX[j]-centerX_L));
            r = sqrt(((dotX[j]-centerX_L)*(dotX[j]-centerX_L))+((dotY[j]-centerY_L)*(dotY[j]-centerY_L)));
            delta_r = DotSpeed*cos(phi);
            delta_theta = (DotSpeed*sin(phi))/r;
            dotX[j] = ((r+delta_r)*cos(theta+delta_theta)) + centerX_L;
            dotY[j] = ((r+delta_r)*sin(theta+delta_theta)) + centerY_L;
            }
            /* Dot drawn, so increase its life count */
            dotLifeL[j]++;
            /* And finally a series of checks on the status of the dot */
            if (dotLifeL[j]>DotLifetime) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));
                  dotLifeL[j] = rand()%DotLifetime;
            }
            if (dotX[j]>(centerX_L+MaxStimulusRadius) || dotX[j]<(centerX_L-MaxStimulusRadius)
                  || dotY[j]>(centerY_L+MaxStimulusRadius) || dotY[j]<(centerY_L-MaxStimulusRadius)) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));
            }
            /* Draw the dot */
            glLoadIdentity();
            glTranslatef(dotX[j],dotY[j],0.0f);      
            glCallList(smallDot);
      }
      /* Finished with all the dots, so update phi */
      phi = phi-(SPOT_PHI_DELTA*PI);
      if (phi <= (-1.0*PI)) phi = PI;

      /* Superimpose fixation mark */
      drawFixation(frameNumber);
}


static void drawMorroneInc_RL(int frameNumber)
{
      double theta, r, delta_r, delta_theta, delta_x, delta_y;
      int j, temp;
      
      double thetaR, rR, delta_rR, delta_thetaR, delta_xR, delta_yR;
      int tempR;

      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
      for (j=0; j<NumberOfDotsInc; j++){

            /* Now calculate the next position of the dot */
            if (j<NumberOfRandomDotsInc)
            {
                  delta_x = DotSpeed*cos(dotDirectionL[j]);
                  delta_y = DotSpeed*sin(dotDirectionL[j]);
                  dotX[j] += delta_x;
                  dotY[j] += delta_y;
            }
            else
            {
            theta = atan2((dotY[j]-centerY_L), (dotX[j]-centerX_L));
            r = sqrt(((dotX[j]-centerX_L)*(dotX[j]-centerX_L))+((dotY[j]-centerY_L)*(dotY[j]-centerY_L)));
            delta_r = DotSpeed*cos(phi);
            delta_theta = (DotSpeed*sin(phi))/r;
            dotX[j] = ((r+delta_r)*cos(theta+delta_theta)) + centerX_L;
            dotY[j] = ((r+delta_r)*sin(theta+delta_theta)) + centerY_L;

            }
            
            /* Dot drawn, so increase its life count */
            dotLifeL[j]++;
            /* And finally a series of checks on the status of the dot */
            if (dotLifeL[j]>DotLifetime) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));
                  dotLifeL[j] = rand()%DotLifetime;
            }
            if (dotX[j]>(centerX_L+MaxStimulusRadius) || dotX[j]<(centerX_L-MaxStimulusRadius)
                  || dotY[j]>(centerY_L+MaxStimulusRadius) || dotY[j]<(centerY_L-MaxStimulusRadius)) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));
            }
            /* Draw the dot */
            glLoadIdentity();
            glTranslatef(dotX[j],dotY[j],0.0f);      
            glCallList(smallDot);
            
            // R added, 2 loops in//
            
            /* Now calculate the next position of the dot */
            if (j<NumberOfRandomDotsIncR)
            {
                  
                  delta_xR = DotSpeed*cos(dotDirectionR[j]);
                  delta_yR = DotSpeed*sin(dotDirectionR[j]);
                  dotXR[j] += delta_xR;
                  dotYR[j] += delta_yR;
            }
            else
            {
            thetaR = atan2((dotYR[j]-centerY_R), (dotXR[j]-centerX_R));
            rR = sqrt(((dotXR[j]-centerX_R)*(dotXR[j]-centerX_R))+((dotYR[j]-centerY_R)*(dotYR[j]-centerY_R)));
            delta_rR = DotSpeed*cos(phi);
            delta_thetaR = (DotSpeed*sin(phi))/rR;
            dotXR[j] = ((r+delta_rR)*cos(thetaR+delta_thetaR)) + centerX_R;
            dotYR[j] = ((r+delta_rR)*sin(thetaR+delta_thetaR)) + centerY_R;
            }
                        
            /* Dot drawn, so increase its life count */
            dotLifeR[j]++;
            /* And finally a series of checks on the status of the dot */
            if (dotLifeR[j]>DotLifetime) {
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotXR[j] = (tempR < MaxStimulusRadius) ? (centerX_R - tempR) : (centerX_R + (tempR-MaxStimulusRadius));
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotYR[j] = (tempR < MaxStimulusRadius) ? (centerY_R - tempR) : (centerY_R + (tempR-MaxStimulusRadius));
                  dotLifeR[j] = rand()%DotLifetime;
            }
            if (dotXR[j]>(centerX_R+MaxStimulusRadius) || dotXR[j]<(centerX_R-MaxStimulusRadius)
                  || dotYR[j]>(centerY_R+MaxStimulusRadius) || dotYR[j]<(centerY_R-MaxStimulusRadius)) {
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotXR[j] = (tempR < MaxStimulusRadius) ? (centerX_R - tempR) : (centerX_R + (tempR-MaxStimulusRadius));
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotYR[j] = (tempR < MaxStimulusRadius) ? (centerY_R - tempR) : (centerY_R + (tempR-MaxStimulusRadius));
                  
            }
            /* Draw the dot */
            glLoadIdentity();
            // glTranslatef(dotX[j],dotY[j],0.0f);      
            glTranslatef(dotXR[j],dotYR[j],0.0f);
            glCallList(smallDot);

            
      }
      /* Finished with all the dots, so update phi */
      phi = phi-(SPOT_PHI_DELTA*PI);
      if (phi <= (-1.0*PI)) phi = PI;

      /* Superimpose fixation mark */
      drawFixation(frameNumber);
}



static void drawMorroneDec_L(int frameNumber)
{
      double theta, r, delta_r, delta_theta, delta_x, delta_y;
      int j, temp;

      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
      for (j=0; j<NumberOfDotsDec; j++){
            /* Now calculate the next position of the dot */
            if (j<NumberOfRandomDotsDec)
            {
                  delta_x = DotSpeed*cos(dotDirectionL[j]);
                  delta_y = DotSpeed*sin(dotDirectionL[j]);
                  dotX[j] += delta_x;
                  dotY[j] += delta_y;
            }
            else
            {
            theta = atan2((dotY[j]-centerY_L), (dotX[j]-centerX_L));
            r = sqrt(((dotX[j]-centerX_L)*(dotX[j]-centerX_L))+((dotY[j]-centerY_L)*(dotY[j]-centerY_L)));
            delta_r = DotSpeed*cos(phi);
            delta_theta = (DotSpeed*sin(phi))/r;
            dotX[j] = ((r+delta_r)*cos(theta+delta_theta)) + centerX_L;
            dotY[j] = ((r+delta_r)*sin(theta+delta_theta)) + centerY_L;
            }
            /* Dot drawn, so increase its life count */
            dotLifeL[j]++;
            /* And finally a series of checks on the status of the dot */
            if (dotLifeL[j]>DotLifetime) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));
                  dotLifeL[j] = rand()%DotLifetime;
            }
            if (dotX[j]>(centerX_L+MaxStimulusRadius) || dotX[j]<(centerX_L-MaxStimulusRadius)
                  || dotY[j]>(centerY_L+MaxStimulusRadius) || dotY[j]<(centerY_L-MaxStimulusRadius)) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));
            }
            /* Draw the dot */
            glLoadIdentity();
            glTranslatef(dotX[j],dotY[j],0.0f);      
            glCallList(smallDot);
      }
      /* Finished with all the dots, so update phi */
      phi = phi-(SPOT_PHI_DELTA*PI);
      if (phi <= (-1.0*PI)) phi = PI;

      /* Superimpose fixation mark */
      drawFixation(frameNumber);
}


static void drawMorroneDec_RL(int frameNumber)
{
      double theta, r, delta_r, delta_theta, delta_x, delta_y;
      int j, temp;
      
      double thetaR, rR, delta_rR, delta_thetaR, delta_xR, delta_yR;
      int tempR;

      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
      for (j=0; j<NumberOfDotsDec; j++){
            /* Now calculate the next position of the dot */
            if (j<NumberOfRandomDotsDec)
            {
                  delta_x = DotSpeed*cos(dotDirectionR[j]);
                  delta_y = DotSpeed*sin(dotDirectionR[j]);
                  dotX[j] += delta_x;
                  dotY[j] += delta_y;            }
            else
            {
            
            theta = atan2((dotY[j]-centerY_R), (dotX[j]-centerX_R));
            r = sqrt(((dotX[j]-centerX_R)*(dotX[j]-centerX_R))+((dotY[j]-centerY_R)*(dotY[j]-centerY_R)));
            delta_r = DotSpeed*cos(phi);
            delta_theta = (DotSpeed*sin(phi))/r;
            dotX[j] = ((r+delta_r)*cos(theta+delta_theta)) + centerX_R;
            dotY[j] = ((r+delta_r)*sin(theta+delta_theta)) + centerY_R;

            }
            /* Dot drawn, so increase its life count */
            dotLifeL[j]++;
            /* And finally a series of checks on the status of the dot */
            
            if (dotLifeL[j]>DotLifetime) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));
                  dotLifeL[j] = rand()%DotLifetime;
            }
            if (dotX[j]>(centerX_L+MaxStimulusRadius) || dotX[j]<(centerX_L-MaxStimulusRadius)
                  || dotY[j]>(centerY_L+MaxStimulusRadius) || dotY[j]<(centerY_L-MaxStimulusRadius)) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));
            }
            /* Draw the dot */
            glLoadIdentity();
            glTranslatef(dotX[j],dotY[j],0.0f);      
            glCallList(smallDot);
            
            
            //R added//
            
            /* Now calculate the next position of the dot */
            if (j<NumberOfRandomDotsDec)
            {
            
                  delta_xR = DotSpeed*cos(dotDirectionR[j]);
                  delta_yR = DotSpeed*sin(dotDirectionR[j]);
                  dotXR[j] += delta_xR;
                  dotYR[j] += delta_yR;
            }
            else
            {
            thetaR = atan2((dotYR[j]-centerY_R), (dotXR[j]-centerX_R));
            rR = sqrt(((dotXR[j]-centerX_R)*(dotXR[j]-centerX_R))+((dotYR[j]-centerY_R)*(dotYR[j]-centerY_R)));
            delta_rR = DotSpeed*cos(phi);
            delta_thetaR = (DotSpeed*sin(phi))/rR;
            dotXR[j] = ((r+delta_rR)*cos(thetaR+delta_thetaR)) + centerX_R;
            dotYR[j] = ((r+delta_rR)*sin(thetaR+delta_thetaR)) + centerY_R;

            }
            /* Dot drawn, so increase its life count */
            dotLifeR[j]++;
            /* And finally a series of checks on the status of the dot */
                  
                  if (dotLifeR[j]>DotLifetime) {
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotXR[j] = (tempR < MaxStimulusRadius) ? (centerX_R - tempR) : (centerX_R + (tempR-MaxStimulusRadius));
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotYR[j] = (tempR < MaxStimulusRadius) ? (centerY_R - tempR) : (centerY_R + (tempR-MaxStimulusRadius));
                  dotLifeR[j] = rand()%DotLifetime;
            }
            if (dotXR[j]>(centerX_R+MaxStimulusRadius) || dotXR[j]<(centerX_R-MaxStimulusRadius)
                  || dotYR[j]>(centerY_R+MaxStimulusRadius) || dotYR[j]<(centerY_R-MaxStimulusRadius)) {
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotXR[j] = (tempR < MaxStimulusRadius) ? (centerX_R - tempR) : (centerX_R + (tempR-MaxStimulusRadius));
                  tempR = rand()%(2*MaxStimulusRadius);
                  dotYR[j] = (tempR < MaxStimulusRadius) ? (centerY_R - tempR) : (centerY_R + (tempR-MaxStimulusRadius));
                  
            }
            /* Draw the dot */
            glLoadIdentity();
            // glTranslatef(dotX[j],dotY[j],0.0f);      
            glTranslatef(dotXR[j],dotYR[j],0.0f);
            glCallList(smallDot);

            
      }
      /* Finished with all the dots, so update phi */
      phi = phi-(SPOT_PHI_DELTA*PI);
      if (phi <= (-1.0*PI)) phi = PI;

      /* Superimpose fixation mark */
      drawFixation(frameNumber);
}


static void drawMorroneBase_R(int frameNumber)
{
      double theta, r, delta_r, delta_theta, delta_x, delta_y;
      int j, temp;

      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
      for (j=0; j<NumberOfDotsBase; j++){
      
            /* Now calculate the next position of the dot */
            if (j<NumberOfRandomDotsBase)
            {
                  delta_x = DotSpeed*cos(dotDirectionR[j]);
                  delta_y = DotSpeed*sin(dotDirectionR[j]);
                  dotX[j] += delta_x;
                  dotY[j] += delta_y;
            }
            else
            {
            theta = atan2((dotY[j]-centerY_R), (dotX[j]-centerX_R));
            r = sqrt(((dotX[j]-centerX_R)*(dotX[j]-centerX_R))+((dotY[j]-centerY_R)*(dotY[j]-centerY_R)));
            delta_r = DotSpeed*cos(phi);
            delta_theta = (DotSpeed*sin(phi))/r;
            dotX[j] = ((r+delta_r)*cos(theta+delta_theta)) + centerX_R;
            dotY[j] = ((r+delta_r)*sin(theta+delta_theta)) + centerY_R;
            }
            /* Dot drawn, so increase its life count */
            dotLifeR[j]++;
            /* And finally a series of checks on the status of the dot */
            if (dotLifeR[j]>DotLifetime) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_R - temp) : (centerX_R + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_R - temp) : (centerY_R + (temp-MaxStimulusRadius));
                  dotLifeR[j] = rand()%DotLifetime;
            }
            if (dotX[j]>(centerX_R+MaxStimulusRadius) || dotX[j]<(centerX_R-MaxStimulusRadius)
                  || dotY[j]>(centerY_R+MaxStimulusRadius) || dotY[j]<(centerY_R-MaxStimulusRadius)) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_R - temp) : (centerX_R + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_R - temp) : (centerY_R + (temp-MaxStimulusRadius));
            }
            /* Draw the dot */
            glLoadIdentity();
            glTranslatef(dotX[j],dotY[j],0.0f);      
            glCallList(smallDot);
      }
      /* Finished with all the dots, so update phi */
      phi = phi-(SPOT_PHI_DELTA*PI);
      if (phi <= (-1.0*PI)) phi = PI;

      /* Superimpose fixation mark */
      drawFixation(frameNumber);
}

                              

static void drawMorroneBase_L(int frameNumber)
{
      double theta, r, delta_r, delta_theta, delta_x, delta_y;
      int j, temp;

      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
      for (j=0; j<NumberOfDotsBase; j++){
      
            /* Now calculate the next position of the dot */
            if (j<NumberOfRandomDotsBase)
            {
                delta_x = DotSpeed*cos(dotDirectionL[j]);
                  delta_y = DotSpeed*sin(dotDirectionL[j]);
                  dotX[j] += delta_x;
                  dotY[j] += delta_y;
                  
            }else
            {
            theta = atan2((dotY[j]-centerY_L), (dotX[j]-centerX_L));
            r = sqrt(((dotX[j]-centerX_L)*(dotX[j]-centerX_L))+((dotY[j]-centerY_L)*(dotY[j]-centerY_L)));
            delta_r = DotSpeed*cos(phi);
            delta_theta = (DotSpeed*sin(phi))/r;
            dotX[j] = ((r+delta_r)*cos(theta+delta_theta)) + centerX_L;
            dotY[j] = ((r+delta_r)*sin(theta+delta_theta)) + centerY_L;
            }
            /* Dot drawn, so increase its life count */
            dotLifeL[j]++;
            /* And finally a series of checks on the status of the dot */
            if (dotLifeL[j]>DotLifetime) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));
                  dotLifeL[j] = rand()%DotLifetime;
            }
            if (dotX[j]>(centerX_L+MaxStimulusRadius) || dotX[j]<(centerX_L-MaxStimulusRadius)
                  || dotY[j]>(centerY_L+MaxStimulusRadius) || dotY[j]<(centerY_L-MaxStimulusRadius)) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_L - temp) : (centerX_L + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_L - temp) : (centerY_L + (temp-MaxStimulusRadius));

            }
            /* Draw the dot */
            glLoadIdentity();
            glTranslatef(dotX[j],dotY[j],0.0f);      
            glCallList(smallDot);
      }
      /* Finished with all the dots, so update phi */
      phi = phi-(SPOT_PHI_DELTA*PI);
      if (phi <= (-1.0*PI)) phi = PI;

      /* Superimpose fixation mark */
      drawFixation(frameNumber);
}



static void drawMorroneInc_R(int frameNumber)
{
      double theta, r, delta_r, delta_theta, delta_x, delta_y;
      int j, temp;

      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
      for (j=0; j<NumberOfDotsInc; j++){
            /* Now calculate the next position of the dot */
            if (j<NumberOfRandomDotsInc)
            {
                  delta_x = DotSpeed*cos(dotDirectionR[j]);
                  delta_y = DotSpeed*sin(dotDirectionR[j]);
                  dotX[j] += delta_x;
                  dotY[j] += delta_y;
            }
            else
            {
            theta = atan2((dotY[j]-centerY_R), (dotX[j]-centerX_R));
            r = sqrt(((dotX[j]-centerX_R)*(dotX[j]-centerX_R))+((dotY[j]-centerY_R)*(dotY[j]-centerY_R)));
            delta_r = DotSpeed*cos(phi);
            delta_theta = (DotSpeed*sin(phi))/r;
            dotX[j] = ((r+delta_r)*cos(theta+delta_theta)) + centerX_R;
            dotY[j] = ((r+delta_r)*sin(theta+delta_theta)) + centerY_R;
            }
            /* Dot drawn, so increase its life count */
            dotLifeR[j]++;
            /* And finally a series of checks on the status of the dot */
            if (dotLifeR[j]>DotLifetime) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_R - temp) : (centerX_R + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_R - temp) : (centerY_R + (temp-MaxStimulusRadius));
                  dotLifeR[j] = rand()%DotLifetime;
            }
            if (dotX[j]>(centerX_R+MaxStimulusRadius) || dotX[j]<(centerX_R-MaxStimulusRadius)
                  || dotY[j]>(centerY_R+MaxStimulusRadius) || dotY[j]<(centerY_R-MaxStimulusRadius)) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_R - temp) : (centerX_R + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_R - temp) : (centerY_R + (temp-MaxStimulusRadius));
            }
            /* Draw the dot */
            glLoadIdentity();
            glTranslatef(dotX[j],dotY[j],0.0f);      
            glCallList(smallDot);
      }
      /* Finished with all the dots, so update phi */
      phi = phi-(SPOT_PHI_DELTA*PI);
      if (phi <= (-1.0*PI)) phi = PI;

      /* Superimpose fixation mark */
      drawFixation(frameNumber);
}



static void drawMorroneDec_R(int frameNumber)
{
      double theta, r, delta_r, delta_theta, delta_x, delta_y;
      int j, temp;

      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
      for (j=0; j<NumberOfDotsDec; j++){
      
            /* Now calculate the next position of the dot */
            if (j<NumberOfRandomDotsDec)
            {
                  delta_x = DotSpeed*cos(dotDirectionR[j]);
                  delta_y = DotSpeed*sin(dotDirectionR[j]);
                  dotX[j] += delta_x;
                  dotY[j] += delta_y;
            }
            else
            {
            theta = atan2((dotY[j]-centerY_R), (dotX[j]-centerX_R));
            r = sqrt(((dotX[j]-centerX_R)*(dotX[j]-centerX_R))+((dotY[j]-centerY_R)*(dotY[j]-centerY_R)));
            delta_r = DotSpeed*cos(phi);
            delta_theta = (DotSpeed*sin(phi))/r;
            dotX[j] = ((r+delta_r)*cos(theta+delta_theta)) + centerX_R;
            dotY[j] = ((r+delta_r)*sin(theta+delta_theta)) + centerY_R;
            }
            /* Dot drawn, so increase its life count */
            dotLifeR[j]++;
            /* And finally a series of checks on the status of the dot */
            if (dotLifeR[j]>DotLifetime) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_R - temp) : (centerX_R + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_R - temp) : (centerY_R + (temp-MaxStimulusRadius));
                  dotLifeR[j] = rand()%DotLifetime;
            }
            if (dotX[j]>(centerX_R+MaxStimulusRadius) || dotX[j]<(centerX_R-MaxStimulusRadius)
                  || dotY[j]>(centerY_R+MaxStimulusRadius) || dotY[j]<(centerY_R-MaxStimulusRadius)) {
                  temp = rand()%(2*MaxStimulusRadius);
                  dotX[j] = (temp < MaxStimulusRadius) ? (centerX_R - temp) : (centerX_R + (temp-MaxStimulusRadius));
                  temp = rand()%(2*MaxStimulusRadius);
                  dotY[j] = (temp < MaxStimulusRadius) ? (centerY_R - temp) : (centerY_R + (temp-MaxStimulusRadius));
            }
            /* Draw the dot */
            glLoadIdentity();
            glTranslatef(dotX[j],dotY[j],0.0f);      
            glCallList(smallDot);
      }
      /* Finished with all the dots, so update phi */
      phi = phi-(SPOT_PHI_DELTA*PI);
      if (phi <= (-1.0*PI)) phi = PI;

      /* Superimpose fixation mark */
      drawFixation(frameNumber);
}


int drawStimulusAB(int whichOne, int numFrames)
{
      float delayLength;
    int done;
      int delay = 1000/fps;
    int thenTicks = -1;
    int nowTicks;
      int phaseStart;
       
      /* First establish how long the stim/interval should last */
      switch (whichOne) {
            case 1:
            case 178:
                  delayLength = bufferlength;
                  break;
            case 2:
            case 6:
            case 10:
            case 14:
            case 18:
            case 22:
            case 26:
            case 30:
            case 34:
            case 38:
            case 42:
            case 46:
            case 50:
            case 54:
            case 58:
            case 62:
            case 66:
            case 70:
            case 74:
            case 78:
            case 82:
            case 86:
            case 90:
            case 94:
            case 98:
            case 102:
            case 106:
            case 110:
            case 114:
            case 118:
            case 122:
            case 126:
            case 130:
            case 134:
            case 138:
            case 142:
            case 146:
            case 150:
            case 154:
            case 158:
            case 162:
            case 166:
            case 170:
            case 174:
                  delayLength = S1length;
                  break;
            case 3:
            case 7:
            case 11:
            case 15:
            case 19:
            case 23:
            case 27:
            case 31:
            case 35:
            case 39:
            case 43:
            case 47:
            case 51:
            case 55:
            case 59:
            case 63:
            case 67:
            case 71:
            case 75:
            case 79:
            case 83:
            case 87:
            case 91:
            case 95:
            case 99:
            case 103:
            case 107:
            case 111:
            case 115:
            case 119:
            case 123:
            case 127:
            case 131:
            case 135:
            case 139:
            case 143:
            case 147:
            case 151:
            case 155:
            case 159:
            case 163:
            case 167:
            case 171:
            case 175:
                  delayLength = ISI;
                  break;
            case 12:
            case 24:
            case 32:
            case 36:
            case 44:
            case 48:
            case 52:
            case 56:
            case 72:
            case 76:
            case 92:
            case 96:
            case 100:
            case 108:
            case 116:
            case 124:
            case 132:
            case 140:
            case 144:
            case 152:
            case 156:
            case 168:
            case 4:
            case 8:
            case 16:
            case 20:
            case 28:
            case 40:
            case 60:
            case 64:
            case 68:
            case 80:
            case 84:
            case 88:
            case 104:
            case 112:
            case 120:
            case 128:
            case 136:
            case 148:
            case 160:
            case 164:
            case 172:
            case 176:
                  delayLength = S2length;
                  break;
            case 113:
                  delayLength = ITI2;
                  break;
            case 17:
            case 45:
            case 153:
                  delayLength = ITI3;
                  break;
            case 13:
            case 5:
            case 29:
            case 33:
            case 41:
            case 73:
            case 77:
            case 125:
            case 137:
                  delayLength = ITI4;
                  break;
            case 49:
            case 57:
            case 61:
            case 69:
            case 85:
            case 105:
            case 129:
            case 157:
            case 161:
            case 173:
            case 177:
                  delayLength = ITI5;
                  break;
            case 25:
            case 9:
            case 81:
            case 89:
            case 97:
            case 101:
            case 117:
            case 141:
            case 165:
            case 169:
                  delayLength = ITI6;
                  break;
            case 21:
            case 53:
            case 109:
            case 121:
                  delayLength = ITI7;
                  break;
            case 37:
            case 133:
            case 149:
                  delayLength = ITI8;
                  break;
            case 65:
            case 145:
                  delayLength = ITI9;
                  break;
            case 93:
                  delayLength = ITI10;
                  break;
      }

      phaseStart = SDL_GetTicks();
      done = 0;
      while ( !done ) {
            /* Figure out which one to draw */
            switch (whichOne) {
            case 6:
            case 14:
            case 22:
            case 30:
            case 34:
            case 38:
            case 50:
            case 54:
            case 66:
            case 74:
            case 82:
            case 86:
            case 94:
            case 114:
            case 118:
            case 126:
            case 130:
            case 142:
            case 150:
            case 158:
            case 162:
            case 174:
                        drawMorroneBase_RL(numFrames);
                        break;
                        
            
            
            case 2:
            case 10:
            case 26:
            case 46:
            case 62:
            case 102:
            case 106:
            case 134:
            case 138:
            case 166:
            case 170:
                        drawMorroneBase_R(numFrames);
                        break;
                  // BaseL below checked and correct      
            case 18:
            case 58:
            case 70:
            case 78:
            case 90:
            case 98:
            case 110:
            case 122:
            case 146:
            case 154:
                        drawMorroneBase_L(numFrames);
                        break;            
            case 1:
            case 178:
            case 113:
            case 45:
            case 13:
            case 25:
            case 29:
            case 33:
            case 73:
            case 125:
            case 137:
            case 49:
            case 61:
            case 85:
            case 105:
            case 129:
            case 157:
            case 161:
            case 173:
            case 177:
            case 9:
            case 101:
            case 165:
            case 169:
            case 133:
      
                        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
                        drawFixation(numFrames);
                        // indicator added below//
                        drawIndicatorFixationR(numFrames);
                        break;
            case 5:
            case 81:
            case 89:
            case 97:
            case 117:
            case 141:
            case 21:
            case 53:
            case 109:
            case 121:
            case 37:
            case 149:
            case 65:
            case 145:
            case 93:
            case 17:
            case 41:
            case 57:
            case 69:
            case 77:
            case 153:
                        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
                        drawFixation(numFrames);
                        // indicator added below//
                        drawIndicatorFixationL(numFrames);
                        break;
            case 8:
            case 16:
            case 40:
            case 42:
            case 52:
            case 84:
            case 88:
            case 120:
            case 128:
            case 160:
            case 176:  
                        drawMorroneInc_RL(numFrames);
                        break;
            case 24:
            case 32:
            case 36:
            case 56:
            case 68:
            case 96:
            case 116:
            case 132:
            case 144:
            case 164:
            case 152:  
                        drawMorroneDec_RL(numFrames);
                        break;
            case 4:
            case 28:
            case 64:
            case 104:
            case 136:
            case 172:  
                        drawMorroneInc_R(numFrames);
                        break;
            case 12:
            case 48:
            case 108:
            case 140:
            case 168:  
                        drawMorroneDec_R(numFrames);
                        break;
                        
            case 20:
            case 60:
            case 80:
            case 112:
            case 148:
                        drawMorroneInc_L(numFrames);
                        break;
            case 44:
            case 72:
            case 92:
            case 100:
            case 124:
            case 156:  
                        drawMorroneDec_L(numFrames);
                        break;            
                        
            }
            SDL_GL_SwapBuffers();
            numFrames++;

            // Time how long each draw-swap-delay cycle takes
            // and adjust delay to get closer to target framerate
            if (thenTicks > 0) {
                  nowTicks = SDL_GetTicks();
                  delay += (1000/fps - (nowTicks-thenTicks));
                  thenTicks = nowTicks;
                  if (delay < 0)
                        delay = 1000/fps;
            }
            else {
                  thenTicks = SDL_GetTicks();
            }
            SDL_Delay(delay);
            
            /* Check to make sure that we havent gone over the block
               length - if we have, we can exit the animatopn loop */
            if ((SDL_GetTicks() - phaseStart) > (delayLength*1000)) done = 1;
      }
      
      return(numFrames);
}

/* ============== Stimulus Presentation Flow Control ============== */

static void mainLoop ()
{
      int i,j;
      int numFrames;
   
      startStim = SDL_GetTicks();
      for (i=1; i<=numBlocks; i++) {
            numFrames = 0;
            /* Check to see whether we are in an odd numbered block */
            if (i&0x01) {
                  /* Drawing A-B ie: [S1 S2][S1 S1] */
                  for (j=1; j<=178; j++) numFrames = drawStimulusAB(j, numFrames);
            }
            /* Otherwise, must be in an even numbered block.... */
      /*      else {
                  /* Drawing B-A ie: [S1 S1][S1 S2]
                  for (j=1; j<=8; j++) numFrames = drawStimulusBA(j, numFrames);
            }*/
      }
      stopStim = SDL_GetTicks();
}

/* ============== Main Program - Init graphics & start stimulus presentation ============== */

int main(int argc, char *argv[])
{
      int i, temp, tempR, done;
    SDL_Event event;
      
      // Init SDL video subsystem
      if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
        fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
            exit(1);
      }

    // Create GL context (1=fullscreen, 0=windowed... handy for debugging)
    createSurface(1);
   
    // Init GL state
    initGL(1024,768);
   
      // Create a model of the dots for drawing
      createDot();
      
      // Initialise dot coordinates
      for (i=0; i<NumberOfDotsBase; i++) {
            temp = rand()%(2*MaxStimulusRadius);
            dotX[i] = (temp < MaxStimulusRadius) ? (centerX - temp) : (centerX + (temp-MaxStimulusRadius));
            temp = rand()%(2*MaxStimulusRadius);
            dotY[i] = (temp < MaxStimulusRadius) ? (centerY - temp) : (centerY + (temp-MaxStimulusRadius));
            // added code AHH
            tempR = rand()%(2*MaxStimulusRadius);
            dotXR[i] = (tempR < MaxStimulusRadius) ? (centerX - tempR) : (centerX + (tempR-MaxStimulusRadius));
            tempR = rand()%(2*MaxStimulusRadius);
            dotYR[i] = (tempR < MaxStimulusRadius) ? (centerY - tempR) : (centerY + (tempR-MaxStimulusRadius));
            // end of added code
            dotLifeL[i] = rand()%DotLifetime;
            dotLifeR[i] = rand()%DotLifetime;
            // ADDITIONAL LINE ADDED TO MAKE DOTLIFE R AND L//
            dotDirectionL[i] = (rand()%360)*(PI/180.0);
            dotDirectionR[i] = (rand()%360)*(PI/180.0);
      }

    /* Clear display & remove the mouse cursor */
    SDL_ShowCursor(SDL_DISABLE);
      
    /* Ready to start stimulus - wait for mouse click & go */
      done = 0;
      while ( !done ) {
            /* Check for any events */
            while ( SDL_PollEvent(&event) ) {
                  switch (event.type) {
                /* Were only interested if we have a mouse button down */
                case SDL_MOUSEBUTTONDOWN:
                              done = 1;
                              break;
                        default:
                              break;
                  }
            }
      }
    /* OK - Lets go... */
    mainLoop();
   
      /* Finished, so return the mouse cursor to the display */
    SDL_ShowCursor(SDL_ENABLE);

    /* Cleanup & quit */
      SDL_Quit();
      
      printf("%f",(float)(stopStim-startStim)/1000);
      
    return 0;
}
[+][-]06/20/07 05:29 AM, ID: 19323924Expert Comment

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[+][-]06/20/07 05:49 AM, ID: 19324048Author Comment

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[+][-]06/20/07 05:53 AM, ID: 19324082Expert Comment

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[+][-]08/01/07 09:32 AM, ID: 19610444Expert Comment

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[+][-]08/01/07 10:42 AM, ID: 19611088Accepted Solution

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About this solution

Zones: 3D Game Programming, Microsoft Visual C++, OpenGL Graphics & Game Programming
Tags: sdl, visual, studio
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Solution Provided By: ikework
Participating Experts: 3
Solution Grade: A
 
[+][-]10/11/07 02:21 AM, ID: 20055244Administrative Comment

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