stuff
[carveJwlIkooP6JGAAIwe30JlM.git] / shaders / sky.h
1 #ifndef SHADER_sky_H
2 #define SHADER_sky_H
3 static void shader_sky_link(void);
4 static void shader_sky_register(void);
5 static struct vg_shader _shader_sky = {
6 .name = "sky",
7 .link = shader_sky_link,
8 .vs =
9 {
10 .orig_file = "../shaders/standard.vs",
11 .static_src =
12 "layout (location=0) in vec3 a_co;\n"
13 "layout (location=1) in vec3 a_norm;\n"
14 "layout (location=2) in vec4 a_colour;\n"
15 "layout (location=3) in vec2 a_uv;\n"
16 "\n"
17 "#line 2 0 \n"
18 "\n"
19 "uniform mat4 uPv;\n"
20 "uniform mat4x3 uMdl;\n"
21 "\n"
22 "out vec4 aColour;\n"
23 "out vec2 aUv;\n"
24 "out vec3 aNorm;\n"
25 "out vec3 aCo;\n"
26 "\n"
27 "void main()\n"
28 "{\n"
29 " gl_Position = uPv * vec4( uMdl * vec4(a_co,1.0), 1.0 );\n"
30 " aColour = a_colour;\n"
31 " aUv = a_uv;\n"
32 " aNorm = mat3(uMdl) * a_norm;\n"
33 " aCo = a_co;\n"
34 "}\n"
35 ""},
36 .fs =
37 {
38 .orig_file = "../shaders/sky.fs",
39 .static_src =
40 "out vec4 FragColor;\n"
41 "\n"
42 "uniform vec4 uColour;\n"
43 "uniform sampler2D uTexGarbage;\n"
44 "uniform float uTime;\n"
45 "\n"
46 "in vec4 aColour;\n"
47 "in vec2 aUv;\n"
48 "in vec3 aNorm;\n"
49 "in vec3 aCo;\n"
50 "\n"
51 "void main()\n"
52 "{\n"
53 " float fintensity = 1.0-(abs(aNorm.y)*0.7);\n"
54 " float fblend = pow(fintensity,6.0);\n"
55 " vec3 horizon = vec3( 0.61, 0.71, 0.86 )*1.5;\n"
56 " vec3 skycolour = vec3( 0.31, 0.56, 0.91 );\n"
57 " vec3 diffuse = mix( skycolour, horizon, fblend );\n"
58 "\n"
59 " float fmove = uTime * 0.004;\n"
60 " vec2 cloudplane = (aCo.xz / (aCo.y*sign(aNorm.y))) * 0.03;\n"
61 " vec4 clouds1 = texture( uTexGarbage, cloudplane + vec2(0.1,0.4)*fmove*2.0 );\n"
62 " vec4 clouds2 = texture( uTexGarbage, cloudplane + vec2(0.3,0.1)*fmove );\n"
63 "\n"
64 " float cloud_d = max(clouds1.b*clouds2.r -0.2 - clouds2.g*0.4,0.0);\n"
65 " float cloud_e = pow(cloud_d,1.5)*pow(abs(aNorm.y),0.3)*2.0;\n"
66 "\n"
67 " vec3 colour_ocean = vec3( 0.61, 0.84, 0.9 );\n"
68 " float fhorizon = step( aNorm.y * 0.5 + 0.5, 0.5 );\n"
69 "\n"
70 " vec3 skycomp = mix(diffuse, vec3(1.0,1.0,1.0), cloud_e);\n"
71 " skycomp = mix(mix(pow(colour_ocean,vec3(6.0))*0.6,skycomp, 0.7),skycomp,fhorizon);\n"
72 "\n"
73 " FragColor = vec4(skycomp, 0.0);\n"
74 "}\n"
75 ""},
76 };
77
78 static GLuint _uniform_sky_uPv;
79 static GLuint _uniform_sky_uMdl;
80 static GLuint _uniform_sky_uColour;
81 static GLuint _uniform_sky_uTexGarbage;
82 static GLuint _uniform_sky_uTime;
83 static void shader_sky_uPv(m4x4f m){
84 glUniformMatrix4fv( _uniform_sky_uPv, 1, GL_FALSE, (float *)m );
85 }
86 static void shader_sky_uMdl(m4x3f m){
87 glUniformMatrix4x3fv( _uniform_sky_uMdl, 1, GL_FALSE, (float *)m );
88 }
89 static void shader_sky_uColour(v4f v){
90 glUniform4fv( _uniform_sky_uColour, 1, v );
91 }
92 static void shader_sky_uTexGarbage(int i){
93 glUniform1i( _uniform_sky_uTexGarbage, i );
94 }
95 static void shader_sky_uTime(float f){
96 glUniform1f( _uniform_sky_uTime, f );
97 }
98 static void shader_sky_register(void){
99 vg_shader_register( &_shader_sky );
100 }
101 static void shader_sky_use(void){ glUseProgram(_shader_sky.id); }
102 static void shader_sky_link(void){
103 _uniform_sky_uPv = glGetUniformLocation( _shader_sky.id, "uPv" );
104 _uniform_sky_uMdl = glGetUniformLocation( _shader_sky.id, "uMdl" );
105 _uniform_sky_uColour = glGetUniformLocation( _shader_sky.id, "uColour" );
106 _uniform_sky_uTexGarbage = glGetUniformLocation( _shader_sky.id, "uTexGarbage" );
107 _uniform_sky_uTime = glGetUniformLocation( _shader_sky.id, "uTime" );
108 }
109 #endif /* SHADER_sky_H */