diff options
Diffstat (limited to 'drivers/gles3/shaders/scene.glsl')
| -rw-r--r-- | drivers/gles3/shaders/scene.glsl | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/gles3/shaders/scene.glsl b/drivers/gles3/shaders/scene.glsl index acece2e639..340a1f24d2 100644 --- a/drivers/gles3/shaders/scene.glsl +++ b/drivers/gles3/shaders/scene.glsl @@ -810,6 +810,9 @@ float contact_shadow_compute(vec3 pos, vec3 dir, float max_distance) { vec2 screen_rel = to_screen - from_screen; + if (length(screen_rel)<0.00001) + return 1.0; //too small, don't do anything + /*float pixel_size; //approximate pixel size if (screen_rel.x > screen_rel.y) { @@ -825,15 +828,16 @@ float contact_shadow_compute(vec3 pos, vec3 dir, float max_distance) { vec2 pixel_incr = normalize(screen_rel)*screen_pixel_size; - float steps = length(screen_rel) / length(pixel_incr); + float steps = length(screen_rel) / length(pixel_incr); + steps = min(2000.0,steps); //put a limit to avoid freezing in some strange situation //steps=10.0; vec4 incr = (dest - source)/steps; float ratio=0.0; float ratio_incr = 1.0/steps; - do { + while(steps>0.0) { source += incr*2.0; bias+=incr*2.0; @@ -851,7 +855,7 @@ float contact_shadow_compute(vec3 pos, vec3 dir, float max_distance) { ratio+=ratio_incr; steps-=1.0; - } while (steps>0.0); + } return 1.0; } |