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# trying to rotate this triangle so that i can tell its 3d

Posted on 2003-10-30
Medium Priority
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hmmm this is got me stumped. as far as i know this is right (obviously not tho) i cant seem to get the viewport or camera to shift back and the shape to rotate. Anyone care to shed any light on this problem?
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Question by:rholding2000
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Author Comment

ID: 9649981
sorry forgot to post the code

#include <windows.h>
#include <glut.h>
#include <gl\gl.h>

GLfloat      rtri;

void renderScene(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBegin(GL_TRIANGLES);
glRotatef(rtri,0.0f,1.0f,0.0f);
glTranslatef(0.0f,0.0f,20.0f);
glColor3f(1.0f,0.0f,0.0f);
glVertex3f( 0.0f, 1.0f, 0.0f);
glColor3f(0.0f,1.0f,0.0f);
glVertex3f(-1.0f,-1.0f, 1.0f);
glColor3f(0.0f,0.0f,1.0f);
glVertex3f( 1.0f,-1.0f, 1.0f);                              // Right Of Triangle (Front)
glColor3f(1.0f,0.0f,0.0f);                                    // Red
glVertex3f( 0.0f, 1.0f, 0.0f);                              // Top Of Triangle (Right)
glColor3f(0.0f,0.0f,1.0f);                                    // Blue
glVertex3f( 1.0f,-1.0f, 1.0f);                              // Left Of Triangle (Right)
glColor3f(0.0f,1.0f,0.0f);                                    // Green
glVertex3f( 1.0f,-1.0f, -1.0f);                              // Right Of Triangle (Right)
glColor3f(1.0f,0.0f,0.0f);                                    // Red
glVertex3f( 0.0f, 1.0f, 0.0f);                              // Top Of Triangle (Back)
glColor3f(0.0f,1.0f,0.0f);                                    // Green
glVertex3f( 1.0f,-1.0f, -1.0f);                              // Left Of Triangle (Back)
glColor3f(0.0f,0.0f,1.0f);                                    // Blue
glVertex3f(-1.0f,-1.0f, -1.0f);                              // Right Of Triangle (Back)
glColor3f(1.0f,0.0f,0.0f);                                    // Red
glVertex3f( 0.0f, 1.0f, 0.0f);                              // Top Of Triangle (Left)
glColor3f(0.0f,0.0f,1.0f);                                    // Blue
glVertex3f(-1.0f,-1.0f,-1.0f);                              // Left Of Triangle (Left)
glColor3f(0.0f,1.0f,0.0f);                                    // Green
glVertex3f(-1.0f,-1.0f, 1.0f);                              // Right Of Triangle (Left)
glEnd();// Reset The Current Modelview Matrix
glFlush();
rtri+=0.2f;

}

void main(int argc, char **argv)
{

glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DEPTH | GLUT_SINGLE | GLUT_RGBA);
glutInitWindowPosition(100,100);
glutInitWindowSize(320,320);
glutCreateWindow("GLUT Initialisation Tutorial");
glutDisplayFunc(renderScene);
glutMainLoop();

}
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LVL 1

Accepted Solution

ID: 9727532
Hi,

I know this is an older post but if you haven't figured this out by now, try moving the glRotatef and glTranslatef before the glBegin() statement. I think that will take care of the rotation problem.
0

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