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add slight shadow bias (needs futhrer work)

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milek7
2019-10-08 00:20:45 +02:00
parent 87068e63e2
commit 43fc2899aa
1 changed files with 5 additions and 3 deletions
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6
shaders/light_common.glsl
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@@ -8,15 +8,17 @@ float calc_shadow()
if (coords.z < 0.0f)
return 1.0f;
float bias = 0.0004f;
//sampler PCF
//float shadow = texture(shadowmap, coords.xyz);
//float shadow = texture(shadowmap, coords.xyz + vec3(0.0, 0.0, bias));
//sampler PCF + PCF
float shadow = 0.0;
vec2 texel = vec2(1.0) / vec2(textureSize(shadowmap, 0));
for (float y = -1.5; y <= 1.5; y += 1.0)
for (float x = -1.5; x <= 1.5; x += 1.0)
shadow += texture(shadowmap, coords.xyz + vec3(vec2(x, y) * texel, 0.0));
shadow += texture(shadowmap, coords.xyz + vec3(vec2(x, y) * texel, bias));
shadow /= 16.0;
return 1.0 - shadow;