out->clip_pos[i] = position[i];
}
+ /* Be careful with NaNs. Comparisons must be true for them. */
/* Do the hardwired planes first:
*/
if (flags & DO_CLIP_XY_GUARD_BAND) {
- if (-0.50 * position[0] + position[3] < 0) mask |= (1<<0);
- if ( 0.50 * position[0] + position[3] < 0) mask |= (1<<1);
- if (-0.50 * position[1] + position[3] < 0) mask |= (1<<2);
- if ( 0.50 * position[1] + position[3] < 0) mask |= (1<<3);
+ if (!(-0.50 * position[0] + position[3] >= 0)) mask |= (1<<0);
+ if (!( 0.50 * position[0] + position[3] >= 0)) mask |= (1<<1);
+ if (!(-0.50 * position[1] + position[3] >= 0)) mask |= (1<<2);
+ if (!( 0.50 * position[1] + position[3] >= 0)) mask |= (1<<3);
}
else if (flags & DO_CLIP_XY) {
- if (-position[0] + position[3] < 0) mask |= (1<<0);
- if ( position[0] + position[3] < 0) mask |= (1<<1);
- if (-position[1] + position[3] < 0) mask |= (1<<2);
- if ( position[1] + position[3] < 0) mask |= (1<<3);
+ if (!(-position[0] + position[3] >= 0)) mask |= (1<<0);
+ if (!( position[0] + position[3] >= 0)) mask |= (1<<1);
+ if (!(-position[1] + position[3] >= 0)) mask |= (1<<2);
+ if (!( position[1] + position[3] >= 0)) mask |= (1<<3);
}
/* Clip Z planes according to full cube, half cube or none.
*/
if (flags & DO_CLIP_FULL_Z) {
- if ( position[2] + position[3] < 0) mask |= (1<<4);
- if (-position[2] + position[3] < 0) mask |= (1<<5);
+ if (!( position[2] + position[3] >= 0)) mask |= (1<<4);
+ if (!(-position[2] + position[3] >= 0)) mask |= (1<<5);
}
else if (flags & DO_CLIP_HALF_Z) {
- if ( position[2] < 0) mask |= (1<<4);
- if (-position[2] + position[3] < 0) mask |= (1<<5);
+ if (!( position[2] >= 0)) mask |= (1<<4);
+ if (!(-position[2] + position[3] >= 0)) mask |= (1<<5);
}
if (flags & DO_CLIP_USER) {
if (clipdist < 0 || util_is_inf_or_nan(clipdist))
mask |= 1 << plane_idx;
} else {
- if (dot4(clipvertex, plane[plane_idx]) < 0)
+ if (!(dot4(clipvertex, plane[plane_idx]) >= 0))
mask |= 1 << plane_idx;
}
}
out = (struct vertex_header *)( (char *)out + info->stride );
}
-
return need_pipeline != 0;
}