shaders/planeinf.h

   1 #ifndef SHADER_planeinf_H
   2 #define SHADER_planeinf_H
   3 static void shader_planeinf_link(void);
   4 static void shader_planeinf_register(void);
   5 static struct vg_shader _shader_planeinf = {
   6    .name = "planeinf",
   7    .link = shader_planeinf_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 vec2 a_uv;\n"
  15 "layout (location=3) in vec4 a_colour;\n"
  16 "layout (location=4) in vec4 a_weights;\n"
  17 "layout (location=5) in ivec4 a_groups;\n"
  18 "\n"
  19 "#line      2        0 \n"
  20 "\n"
  21 "uniform mat4 uPv;\n"
  22 "uniform mat4x3 uMdl;\n"
  23 "\n"
  24 "out vec4 aColour;\n"
  25 "out vec2 aUv;\n"
  26 "out vec3 aNorm;\n"
  27 "out vec3 aCo;\n"
  28 "out vec3 aWorldCo;\n"
  29 "\n"
  30 "void main()\n"
  31 "{\n"
  32 "   vec3 world_pos = uMdl * vec4(a_co,1.0);\n"
  33 "   gl_Position = uPv * vec4( world_pos, 1.0 );\n"
  34 "   aColour = a_colour;\n"
  35 "   aUv = a_uv;\n"
  36 "   aNorm = mat3(uMdl) * a_norm;\n"
  37 "   aCo = a_co;\n"
  38 "   aWorldCo = world_pos;\n"
  39 "}\n"
  40 ""},
  41    .fs =
  42 {
  43 .orig_file = "../../shaders/planeinf.fs",
  44 .static_src =
  45 "\n"
  46 "#line      2        0 \n"
  47 "\n"
  48 "out vec4 FragColor;\n"
  49 "\n"
  50 "uniform vec3 uCamera;\n"
  51 "uniform vec4 uPlane;\n"
  52 "\n"
  53 "in vec4 aColour;\n"
  54 "in vec2 aUv;\n"
  55 "in vec3 aNorm;\n"
  56 "in vec3 aCo;\n"
  57 "\n"
  58 "float ray_plane( vec3 pos, vec3 dir, vec4 plane )\n"
  59 "{\n"
  60 "   float d = dot( plane.xyz, dir );\n"
  61 "   float t = dot((plane.xyz*plane.w - pos),plane.xyz) / d;\n"
  62 "   return t;\n"
  63 "}\n"
  64 "\n"
  65 "void main()\n"
  66 "{\n"
  67 "   float fdist = ray_plane( uCamera, -aNorm, uPlane );\n"
  68 "   vec3 world_pos = uCamera - aNorm*fdist;\n"
  69 "\n"
  70 "   FragColor = vec4(fract(world_pos*0.1),1.0);\n"
  71 "}\n"
  72 ""},
  73 };
  74
  75 static GLuint _uniform_planeinf_uPv;
  76 static GLuint _uniform_planeinf_uMdl;
  77 static GLuint _uniform_planeinf_uCamera;
  78 static GLuint _uniform_planeinf_uPlane;
  79 static void shader_planeinf_uPv(m4x4f m){
  80    glUniformMatrix4fv( _uniform_planeinf_uPv, 1, GL_FALSE, (float *)m );
  81 }
  82 static void shader_planeinf_uMdl(m4x3f m){
  83    glUniformMatrix4x3fv( _uniform_planeinf_uMdl, 1, GL_FALSE, (float *)m );
  84 }
  85 static void shader_planeinf_uCamera(v3f v){
  86    glUniform3fv( _uniform_planeinf_uCamera, 1, v );
  87 }
  88 static void shader_planeinf_uPlane(v4f v){
  89    glUniform4fv( _uniform_planeinf_uPlane, 1, v );
  90 }
  91 static void shader_planeinf_register(void){
  92    vg_shader_register( &_shader_planeinf );
  93 }
  94 static void shader_planeinf_use(void){ glUseProgram(_shader_planeinf.id); }
  95 static void shader_planeinf_link(void){
  96    _uniform_planeinf_uPv = glGetUniformLocation( _shader_planeinf.id, "uPv" );
  97    _uniform_planeinf_uMdl = glGetUniformLocation( _shader_planeinf.id, "uMdl" );
  98    _uniform_planeinf_uCamera = glGetUniformLocation( _shader_planeinf.id, "uCamera" );
  99    _uniform_planeinf_uPlane = glGetUniformLocation( _shader_planeinf.id, "uPlane" );
 100 }
 101 #endif /* SHADER_planeinf_H */