oss/luanti
oss/luanti
1
0
Fork 0
mirror of https://github.com/luanti-org/luanti.git synced 2025-08-01 17:38:41 +00:00
Code Wiki Activity

Shadow mapping render pass (#11244)

Browse source 
Co-authored-by: x2048 <codeforsmile@gmail.com>
This commit is contained in:
Liso 2021-06-06 18:51:21 +02:00 • committed by GitHub
parent 46f42e15c4
commit c47313db65
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
35 changed files with 2624 additions and 38 deletions
Download patch file Download diff file Expand all files Collapse all files

46
client/shaders/object_shader/opengl_vertex.glsl
View file

@ -13,12 +13,37 @@ varying mediump vec2 varTexCoord;
centroid varying vec2 varTexCoord;
#endif
#ifdef ENABLE_DYNAMIC_SHADOWS
// shadow uniforms
uniform vec3 v_LightDirection;
uniform float f_textureresolution;
uniform mat4 m_ShadowViewProj;
uniform float f_shadowfar;
uniform float f_shadow_strength;
uniform float f_timeofday;
varying float cosLight;
varying float normalOffsetScale;
varying float adj_shadow_strength;
varying float f_normal_length;
#endif
varying vec3 eyeVec;
varying float vIDiff;
const float e = 2.718281828459;
const float BS = 10.0;
#ifdef ENABLE_DYNAMIC_SHADOWS
// custom smoothstep implementation because it's not defined in glsl1.2
// https://docs.gl/sl4/smoothstep
float mtsmoothstep(in float edge0, in float edge1, in float x)
{
float t = clamp((x - edge0) / (edge1 - edge0), 0.0, 1.0);
return t * t * (3.0 - 2.0 * t);
}
#endif
float directional_ambient(vec3 normal)
{
vec3 v = normal * normal;
@ -54,4 +79,25 @@ void main(void)
#else
varColor = inVertexColor;
#endif
#ifdef ENABLE_DYNAMIC_SHADOWS
cosLight = max(0.0, dot(vNormal, -v_LightDirection));
float texelSize = 0.51;
float slopeScale = clamp(1.0 - cosLight, 0.0, 1.0);
normalOffsetScale = texelSize * slopeScale;
if (f_timeofday < 0.2) {
adj_shadow_strength = f_shadow_strength * 0.5 *
(1.0 - mtsmoothstep(0.18, 0.2, f_timeofday));
} else if (f_timeofday >= 0.8) {
adj_shadow_strength = f_shadow_strength * 0.5 *
mtsmoothstep(0.8, 0.83, f_timeofday);
} else {
adj_shadow_strength = f_shadow_strength *
mtsmoothstep(0.20, 0.25, f_timeofday) *
(1.0 - mtsmoothstep(0.7, 0.8, f_timeofday));
}
f_normal_length = length(vNormal);
#endif
}