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 .static_src =
  11 "layout (location=0) in vec3 a_co;\n"
  12 "layout (location=1) in vec3 a_norm;\n"
  13 "layout (location=2) in vec2 a_uv;\n"
  14 "layout (location=3) in vec4 a_colour;\n"
  15 "layout (location=4) in vec4 a_weights;\n"
  16 "layout (location=5) in ivec4 a_groups;\n"
  17 "\n"
  18 "#line      2        0 \n"
  19 "\n"
  20 "uniform mat4x3 uMdl;\n"
  21 "uniform mat4 uPv;\n"
  22 "\n"
  23 "uniform mat4x3 uMotion;\n"
  24 "\n"
  25 "out vec4 aColour;\n"
  26 "out vec2 aUv;\n"
  27 "out vec3 aNorm;\n"
  28 "out vec3 aCo;\n"
  29 "out vec3 aWorldCo;\n"
  30 "\n"
  31 "out vec3 aMotionVec0;\n"
  32 "out vec3 aMotionVec1;\n"
  33 "\n"
  34 "void main()\n"
  35 "{\n"
  36 "   vec3 world_pos0 = uMdl    * vec4(a_co,1.0);\n"
  37 "   vec3 world_pos1 = uMotion * vec4(world_pos0,1.0);\n"
  38 "   \n"
  39 "   vec4 vproj0 = uPv * vec4( world_pos0, 1.0 );\n"
  40 "   vec4 vproj1 = uPv * vec4( world_pos1, 1.0 );\n"
  41 "\n"
  42 "   aMotionVec0 = vec3( vproj0.xy, vproj0.w );\n"
  43 "   aMotionVec1 = vec3( vproj1.xy, vproj1.w );\n"
  44 "\n"
  45 "   gl_Position = vproj0;\n"
  46 "   aWorldCo = world_pos0;\n"
  47 "   aColour = a_colour;\n"
  48 "   aUv = a_uv;\n"
  49 "   aNorm = mat3(uMdl) * a_norm;\n"
  50 "   aCo = a_co;\n"
  51 "}\n"
  52 ""},
  53    .fs =
  54 {
  55 .static_src =
  56 "\n"
  57 "#line      2        0 \n"
  58 "\n"
  59 "out vec4 FragColor;\n"
  60 "\n"
  61 "uniform vec3 uCamera;\n"
  62 "uniform vec4 uPlane;\n"
  63 "\n"
  64 "in vec4 aColour;\n"
  65 "in vec2 aUv;\n"
  66 "in vec3 aNorm;\n"
  67 "in vec3 aCo;\n"
  68 "\n"
  69 "float ray_plane( vec3 pos, vec3 dir, vec4 plane )\n"
  70 "{\n"
  71 "   float d = dot( plane.xyz, dir );\n"
  72 "   float t = dot((plane.xyz*plane.w - pos),plane.xyz) / d;\n"
  73 "   return t;\n"
  74 "}\n"
  75 "\n"
  76 "void main()\n"
  77 "{\n"
  78 "   float fdist = ray_plane( uCamera, -aNorm, uPlane );\n"
  79 "   vec3 world_pos = uCamera - aNorm*fdist;\n"
  80 "\n"
  81 "   FragColor = vec4(fract(world_pos*0.1),1.0);\n"
  82 "}\n"
  83 ""},
  84 };
  85
  86 static GLuint _uniform_planeinf_uMdl;
  87 static GLuint _uniform_planeinf_uPv;
  88 static GLuint _uniform_planeinf_uMotion;
  89 static GLuint _uniform_planeinf_uCamera;
  90 static GLuint _uniform_planeinf_uPlane;
  91 static void shader_planeinf_uMdl(m4x3f m){
  92    glUniformMatrix4x3fv(_uniform_planeinf_uMdl,1,GL_FALSE,(float*)m);
  93 }
  94 static void shader_planeinf_uPv(m4x4f m){
  95    glUniformMatrix4fv(_uniform_planeinf_uPv,1,GL_FALSE,(float*)m);
  96 }
  97 static void shader_planeinf_uMotion(m4x3f m){
  98    glUniformMatrix4x3fv(_uniform_planeinf_uMotion,1,GL_FALSE,(float*)m);
  99 }
 100 static void shader_planeinf_uCamera(v3f v){
 101    glUniform3fv(_uniform_planeinf_uCamera,1,v);
 102 }
 103 static void shader_planeinf_uPlane(v4f v){
 104    glUniform4fv(_uniform_planeinf_uPlane,1,v);
 105 }
 106 static void shader_planeinf_register(void){
 107    vg_shader_register( &_shader_planeinf );
 108 }
 109 static void shader_planeinf_use(void){ glUseProgram(_shader_planeinf.id); }
 110 static void shader_planeinf_link(void){
 111    _uniform_planeinf_uMdl = glGetUniformLocation( _shader_planeinf.id, "uMdl" );
 112    _uniform_planeinf_uPv = glGetUniformLocation( _shader_planeinf.id, "uPv" );
 113    _uniform_planeinf_uMotion = glGetUniformLocation( _shader_planeinf.id, "uMotion" );
 114    _uniform_planeinf_uCamera = glGetUniformLocation( _shader_planeinf.id, "uCamera" );
 115    _uniform_planeinf_uPlane = glGetUniformLocation( _shader_planeinf.id, "uPlane" );
 116 }
 117 #endif /* SHADER_planeinf_H */