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How do i rotate a quad by its origen/pivot point? direct3d
Posted on 2007-11-21
How do i rotate a quad by its origen/pivot point? direct3d
i use the following: for define my quad i know how to rotate it by it rotates by the top-left point and not by his origen point? any help?
i really need this.
vertexarray[0].x := 0;
vertexarray[0].y := 0;
vertexarray[0].z := 0.0;
vertexarray[1].x := 0;
vertexarray[1].y := 64;
vertexarray[1].z := 0.0;
vertexarray[2].x := 0;
vertexarray[2].y := 0;
vertexarray[2].z := 0.0;
vertexarray[2].rhw := 1.0;
vertexarray[3].x := 64;
vertexarray[3].y := 0;
vertexarray[3].z := 0.0;
vertexarray[4].x := 64;
vertexarray[4].y := 0;
vertexarray[4].z := 0.0;
vertexarray[5].x := 64;
vertexarray[5].y := 64;
vertexarray[5].z := 0.0;
vertexarray[6].x := 0;
vertexarray[6].y := 64;
vertexarray[6].z := 0.0;