Lines Matching defs:y1
57 /* draw a triangle with vertices at (x1, y1), (x2, y2)
60 static void drawTriangle (GLfloat x1, GLfloat y1, GLfloat x2,
64 glVertex3f (x1, y1, z);
71 static void drawViewVolume (GLfloat x1, GLfloat x2, GLfloat y1,
76 glVertex3f (x1, y1, -z1);
77 glVertex3f (x2, y1, -z1);
83 glVertex3f (x1, y1, -z2);
84 glVertex3f (x2, y1, -z2);
90 glVertex3f (x1, y1, -z1);
91 glVertex3f (x1, y1, -z2);
94 glVertex3f (x2, y1, -z1);
95 glVertex3f (x2, y1, -z2);