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Handle day-night transition in shader and make light sources brighter when shaders are used

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This commit is contained in:
Perttu Ahola 2012-12-02 14:24:58 +02:00
parent 566f7f638a
commit cd1f604ffe
7 changed files with 132 additions and 50 deletions
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45
client/shaders/test_shader_1/opengl_vertex.glsl
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@ -2,6 +2,7 @@
uniform mat4 mWorldViewProj;
uniform mat4 mInvWorld;
uniform mat4 mTransWorld;
uniform float dayNightRatio;
varying vec3 vPosition;
@ -11,15 +12,43 @@ void main(void)
vPosition = (mWorldViewProj * gl_Vertex).xyz;
if(gl_Normal.y > 0.5)
gl_FrontColor = gl_BackColor = gl_Color;
else
gl_FrontColor = gl_BackColor = gl_Color * 0.7;
vec4 color;
//color = vec4(1.0, 1.0, 1.0, 1.0);
/*if(gl_Normal.y > 0.5)
gl_FrontColor = gl_BackColor = vec4(1.0, 1.0, 1.0, 1.0);
else
gl_FrontColor = gl_BackColor = vec4(1.0, 1.0, 1.0, 1.0) * 0.7;*/
float day = gl_Color.r;
float night = gl_Color.g;
float light_source = gl_Color.b;
/*color.r = mix(night, day, dayNightRatio);
color.g = color.r;
color.b = color.r;*/
float rg = mix(night, day, dayNightRatio);
rg += light_source * 1.0; // Make light sources brighter
float b = rg;
// Moonlight is blue
b += (day - night) / 13.0;
rg -= (day - night) / 13.0;
// Emphase blue a bit in darker places
// See C++ implementation in mapblock_mesh.cpp finalColorBlend()
b += max(0.0, (1.0 - abs(b - 0.13)/0.17) * 0.025);
// Artificial light is yellow-ish
// See C++ implementation in mapblock_mesh.cpp finalColorBlend()
rg += max(0.0, (1.0 - abs(rg - 0.85)/0.15) * 0.065);
color.r = rg;
color.g = rg;
color.b = b;
if(gl_Normal.y <= 0.5)
color *= 0.7;
color.a = gl_Color.a;
gl_FrontColor = gl_BackColor = color;
gl_TexCoord[0] = gl_MultiTexCoord0;
}