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 "#line       1        2 \n"
  21 "const float k_motion_lerp_amount = 0.01;\n"
  22 "\n"
  23 "#line      2        0 \n"
  24 "\n"
  25 "out vec3 aMotionVec0;\n"
  26 "out vec3 aMotionVec1;\n"
  27 "\n"
  28 "void vs_motion_out( vec4 vproj0, vec4 vproj1 )\n"
  29 "{\n"
  30 "   // This magically solves some artifacting errors!\n"
  31 "   //\n"
  32 "   vproj1 = vproj0*(1.0-k_motion_lerp_amount) + vproj1*k_motion_lerp_amount;\n"
  33 "\n"
  34 "   aMotionVec0 = vec3( vproj0.xy, vproj0.w );\n"
  35 "   aMotionVec1 = vec3( vproj1.xy, vproj1.w );\n"
  36 "}\n"
  37 "\n"
  38 "#line      3        0 \n"
  39 "\n"
  40 "uniform mat4x3 uMdl;\n"
  41 "uniform mat4 uPv;\n"
  42 "uniform mat4 uPvmPrev;\n"
  43 "\n"
  44 "out vec4 aColour;\n"
  45 "out vec2 aUv;\n"
  46 "out vec3 aNorm;\n"
  47 "out vec3 aCo;\n"
  48 "out vec3 aWorldCo;\n"
  49 "\n"
  50 "void main()\n"
  51 "{\n"
  52 "   vec3 world_pos0 = uMdl     * vec4( a_co, 1.0 );\n"
  53 "   vec4 vproj0     = uPv      * vec4( world_pos0, 1.0 );\n"
  54 "   vec4 vproj1     = uPvmPrev * vec4( a_co, 1.0 );\n"
  55 "\n"
  56 "   vs_motion_out( vproj0, vproj1 );\n"
  57 "\n"
  58 "   gl_Position = vproj0;\n"
  59 "   aWorldCo = world_pos0;\n"
  60 "   aColour = a_colour;\n"
  61 "   aUv = a_uv;\n"
  62 "   aNorm = mat3(uMdl) * a_norm;\n"
  63 "   aCo = a_co;\n"
  64 "}\n"
  65 ""},
  66    .fs =
  67 {
  68 .orig_file = "../../shaders/planeinf.fs",
  69 .static_src =
  70 "\n"
  71 "#line      2        0 \n"
  72 "\n"
  73 "out vec4 FragColor;\n"
  74 "\n"
  75 "uniform vec3 uCamera;\n"
  76 "uniform vec4 uPlane;\n"
  77 "\n"
  78 "in vec4 aColour;\n"
  79 "in vec2 aUv;\n"
  80 "in vec3 aNorm;\n"
  81 "in vec3 aCo;\n"
  82 "\n"
  83 "float ray_plane( vec3 pos, vec3 dir, vec4 plane )\n"
  84 "{\n"
  85 "   float d = dot( plane.xyz, dir );\n"
  86 "   float t = dot((plane.xyz*plane.w - pos),plane.xyz) / d;\n"
  87 "   return t;\n"
  88 "}\n"
  89 "\n"
  90 "void main()\n"
  91 "{\n"
  92 "   float fdist = ray_plane( uCamera, -aNorm, uPlane );\n"
  93 "   vec3 world_pos = uCamera - aNorm*fdist;\n"
  94 "\n"
  95 "   FragColor = vec4(fract(world_pos*0.1),1.0);\n"
  96 "}\n"
  97 ""},
  98 };
  99
 100 static GLuint _uniform_planeinf_uMdl;
 101 static GLuint _uniform_planeinf_uPv;
 102 static GLuint _uniform_planeinf_uPvmPrev;
 103 static GLuint _uniform_planeinf_uCamera;
 104 static GLuint _uniform_planeinf_uPlane;
 105 static void shader_planeinf_uMdl(m4x3f m){
 106    glUniformMatrix4x3fv( _uniform_planeinf_uMdl, 1, GL_FALSE, (float *)m );
 107 }
 108 static void shader_planeinf_uPv(m4x4f m){
 109    glUniformMatrix4fv( _uniform_planeinf_uPv, 1, GL_FALSE, (float *)m );
 110 }
 111 static void shader_planeinf_uPvmPrev(m4x4f m){
 112    glUniformMatrix4fv( _uniform_planeinf_uPvmPrev, 1, GL_FALSE, (float *)m );
 113 }
 114 static void shader_planeinf_uCamera(v3f v){
 115    glUniform3fv( _uniform_planeinf_uCamera, 1, v );
 116 }
 117 static void shader_planeinf_uPlane(v4f v){
 118    glUniform4fv( _uniform_planeinf_uPlane, 1, v );
 119 }
 120 static void shader_planeinf_register(void){
 121    vg_shader_register( &_shader_planeinf );
 122 }
 123 static void shader_planeinf_use(void){ glUseProgram(_shader_planeinf.id); }
 124 static void shader_planeinf_link(void){
 125    _uniform_planeinf_uMdl = glGetUniformLocation( _shader_planeinf.id, "uMdl" );
 126    _uniform_planeinf_uPv = glGetUniformLocation( _shader_planeinf.id, "uPv" );
 127    _uniform_planeinf_uPvmPrev = glGetUniformLocation( _shader_planeinf.id, "uPvmPrev" );
 128    _uniform_planeinf_uCamera = glGetUniformLocation( _shader_planeinf.id, "uCamera" );
 129    _uniform_planeinf_uPlane = glGetUniformLocation( _shader_planeinf.id, "uPlane" );
 130 }
 131 #endif /* SHADER_planeinf_H */