ilikecats/stk-code_catmod
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Implement sun as an disk area light.

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Solid angle is defaulted to sun's one.
This commit is contained in:
Vincent Lejeune 2014-11-21 01:54:30 +01:00
parent fcba1dab86
commit 4a8afd2d40
2 changed files with 23 additions and 3 deletions
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14
data/shaders/sunlight.frag
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@ -4,7 +4,8 @@ uniform sampler2D dtex;
uniform vec3 direction;
uniform vec3 col;
uniform mat4 invproj;
uniform float sunangle = .54;
//uniform int hasclouds;
//uniform vec2 wind;
@ -37,7 +38,16 @@ void main() {
float NdotL = max(0., dot(norm, L));
vec3 Specular = getSpecular(norm, eyedir, L, col, roughness) * NdotL;
vec3 D = direction;
vec3 R = reflect(eyedir, norm);
float angle = 3.14 * sunangle / 180;
float d = cos(angle);
float r = sin(angle);
float DdotR = dot (D, R);
vec3 S = R - DdotR * D;
vec3 Lightdir = DdotR < d ? normalize (d * D + normalize (S) * r) : R;
vec3 Specular = getSpecular(norm, eyedir, L, col, roughness) * dot(Lightdir, norm);
vec3 outcol = NdotL * col;

12
data/shaders/sunlightshadow.frag
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@ -9,6 +9,7 @@ uniform float splitmax;
uniform vec3 direction;
uniform vec3 col;
uniform float sunangle = .54;
in vec2 uv;
out vec4 Diff;
@ -51,7 +52,16 @@ void main() {
float NdotL = max(0., dot(norm, L));
vec3 Specular = getSpecular(norm, eyedir, L, col, roughness) * NdotL;
vec3 D = direction;
vec3 R = reflect(eyedir, norm);
float angle = 3.14 * sunangle / 180;
float d = cos(angle);
float r = sin(angle);
float DdotR = dot (D, R);
vec3 S = R - DdotR * D;
vec3 Lightdir = DdotR < d ? normalize (d * D + normalize (S) * r) : R;
vec3 Specular = getSpecular(norm, eyedir, Lightdir, col, roughness) * dot(norm, Lightdir);
vec3 outcol = NdotL * col;