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author | RealBadAngel <mk@realbadangel.pl> | 2013-12-03 17:21:40 +0100 |
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committer | PilzAdam <pilzadam@minetest.net> | 2013-12-03 18:55:25 +0100 |
commit | 2330267d2207208799ad347ea0d129c0b4551d61 (patch) | |
tree | a4418b0c9fe42ee7944f0531c76f353069735615 /client/shaders/alpha_shader/opengl_vertex.glsl | |
parent | 60113bde74784f4a0125ffa005e9404fbd5cb5b1 (diff) | |
download | minetest-2330267d2207208799ad347ea0d129c0b4551d61.tar.gz minetest-2330267d2207208799ad347ea0d129c0b4551d61.tar.bz2 minetest-2330267d2207208799ad347ea0d129c0b4551d61.zip |
Shaders rework.
Diffstat (limited to 'client/shaders/alpha_shader/opengl_vertex.glsl')
-rw-r--r-- | client/shaders/alpha_shader/opengl_vertex.glsl | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/client/shaders/alpha_shader/opengl_vertex.glsl b/client/shaders/alpha_shader/opengl_vertex.glsl new file mode 100644 index 000000000..c26fdd3d5 --- /dev/null +++ b/client/shaders/alpha_shader/opengl_vertex.glsl @@ -0,0 +1,99 @@ +#version 120
+
+uniform mat4 mWorldViewProj;
+uniform mat4 mInvWorld;
+uniform mat4 mTransWorld;
+uniform float dayNightRatio;
+
+uniform vec3 eyePosition;
+
+varying vec3 vPosition;
+varying vec3 eyeVec;
+varying vec3 tsEyeVec;
+
+void main(void)
+{
+ gl_Position = mWorldViewProj * gl_Vertex;
+ vPosition = (mWorldViewProj * gl_Vertex).xyz;
+
+ vec3 normal,tangent,binormal;
+ normal = normalize(gl_NormalMatrix * gl_Normal);
+
+ if (gl_Normal.x > 0.5) {
+ // 1.0, 0.0, 0.0
+ tangent = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, -1.0));
+ binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
+ } else if (gl_Normal.x < -0.5) {
+ // -1.0, 0.0, 0.0
+ tangent = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
+ binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
+ } else if (gl_Normal.y > 0.5) {
+ // 0.0, 1.0, 0.0
+ tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
+ binormal = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
+ } else if (gl_Normal.y < -0.5) {
+ // 0.0, -1.0, 0.0
+ tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
+ binormal = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
+ } else if (gl_Normal.z > 0.5) {
+ // 0.0, 0.0, 1.0
+ tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
+ binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
+ } else if (gl_Normal.z < -0.5) {
+ // 0.0, 0.0, -1.0
+ tangent = normalize(gl_NormalMatrix * vec3(-1.0, 0.0, 0.0));
+ binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
+ }
+
+ mat3 tbnMatrix = mat3(tangent.x, binormal.x, normal.x,
+ tangent.y, binormal.y, normal.y,
+ tangent.z, binormal.z, normal.z);
+
+ eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
+ tsEyeVec = normalize(eyeVec * tbnMatrix);
+
+ vec4 color;
+ //color = vec4(1.0, 1.0, 1.0, 1.0);
+
+ 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 * 2.5; // 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 = clamp(rg,0.0,1.0);
+ color.g = clamp(rg,0.0,1.0);
+ color.b = clamp(b,0.0,1.0);
+
+ // Make sides and bottom darker than the top
+ color = color * color; // SRGB -> Linear
+ if(gl_Normal.y <= 0.5)
+ color *= 0.6;
+ //color *= 0.7;
+ color = sqrt(color); // Linear -> SRGB
+
+ color.a = gl_Color.a;
+
+ gl_FrontColor = gl_BackColor = color;
+
+ gl_TexCoord[0] = gl_MultiTexCoord0;
+
+}
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