Lines Matching defs:dy
46 GLfloat dx, dy; /* direction vector */
222 const GLfloat dy = 1.0F / (GLfloat) ySamples;
250 samples[j][1] = y * dy + 0.5F * dy;
341 const GLfloat absDy = (line->dy < 0.0F) ? -line->dy : line->dy;
344 const GLfloat y0 = line->y0 + t0 * line->dy;
346 const GLfloat y1 = line->y0 + t1 * line->dy;
369 GLfloat dydx = line->dy / line->dx;
375 if (line->dy >= 0.0) {
387 if (line->dy <= 0.0) {
415 GLfloat dxdy = line->dx / line->dy;