X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=shaders%2Fsky.h;fp=shaders%2Fsky.h;h=55a2046ba92e1b85711138730201cd5eaf93387b;hb=7758c7efec3956c68294bc914e7524045a2b1bd7;hp=0000000000000000000000000000000000000000;hpb=1f1d636056450dcd23cce55c0795ec6276272531;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/shaders/sky.h b/shaders/sky.h
new file mode 100644
index 0000000..55a2046
--- /dev/null
+++ b/shaders/sky.h
@@ -0,0 +1,84 @@
+#ifndef SHADER_sky_H
+#define SHADER_sky_H
+static void shader_sky_link(void);
+static void shader_sky_register(void);
+static struct vg_shader _shader_sky = {
+   .name = "sky",
+   .link = shader_sky_link,
+   .vs = 
+{
+.orig_file = "../shaders/standard.vs",
+.static_src = 
+"layout (location=0) in vec3 a_co;\n"
+"layout (location=1) in vec3 a_norm;\n"
+"layout (location=2) in vec4 a_colour;\n"
+"layout (location=3) in vec2 a_uv;\n"
+"\n"
+"#line      2        0 \n"
+"\n"
+"uniform mat4 uPv;\n"
+"uniform mat4x3 uMdl;\n"
+"\n"
+"out vec4 aColour;\n"
+"out vec2 aUv;\n"
+"out vec3 aNorm;\n"
+"out vec3 aCo;\n"
+"\n"
+"void main()\n"
+"{\n"
+"   gl_Position = uPv * vec4( uMdl * vec4(a_co,1.0), 1.0 );\n"
+"   aColour = a_colour;\n"
+"   aUv = a_uv;\n"
+"   aNorm = mat3(uMdl) * a_norm;\n"
+"   aCo = a_co;\n"
+"}\n"
+""},
+   .fs = 
+{
+.orig_file = "../shaders/sky.fs",
+.static_src = 
+"out vec4 FragColor;\n"
+"\n"
+"uniform vec4 uColour;\n"
+"\n"
+"in vec4 aColour;\n"
+"in vec2 aUv;\n"
+"in vec3 aNorm;\n"
+"in vec3 aCo;\n"
+"\n"
+"void main()\n"
+"{\n"
+"   float fintensity = 1.0-(abs(aNorm.y)*0.7);\n"
+"   float angle = -dot(vec3(0.95,0.0,-0.3),aNorm)*0.5+0.5;\n"
+"   float fblend = pow(fintensity,6.0) * angle;\n"
+"   vec3 horizon = vec3(0.9,0.9,0.8);\n"
+"   vec3 skycolour = vec3(0.4,0.5,0.8);\n"
+"   vec3 diffuse = mix( skycolour, horizon, fblend );\n"
+"\n"
+"   FragColor = vec4(diffuse,1.0);\n"
+"}\n"
+""},
+};
+
+static GLuint _uniform_sky_uPv;
+static GLuint _uniform_sky_uMdl;
+static GLuint _uniform_sky_uColour;
+static void shader_sky_uPv(m4x4f m){
+   glUniformMatrix4fv( _uniform_sky_uPv, 1, GL_FALSE, (float *)m );
+}
+static void shader_sky_uMdl(m4x3f m){
+   glUniformMatrix4x3fv( _uniform_sky_uMdl, 1, GL_FALSE, (float *)m );
+}
+static void shader_sky_uColour(v4f v){
+   glUniform4fv( _uniform_sky_uColour, 1, v );
+}
+static void shader_sky_register(void){
+   vg_shader_register( &_shader_sky );
+}
+static void shader_sky_use(void){ glUseProgram(_shader_sky.id); }
+static void shader_sky_link(void){
+   _uniform_sky_uPv = glGetUniformLocation( _shader_sky.id, "uPv" );
+   _uniform_sky_uMdl = glGetUniformLocation( _shader_sky.id, "uMdl" );
+   _uniform_sky_uColour = glGetUniformLocation( _shader_sky.id, "uColour" );
+}
+#endif /* SHADER_sky_H */