shaders/gate.h

   1 #ifndef SHADER_gate_H
   2 #define SHADER_gate_H
   3 static void shader_gate_link(void);
   4 static void shader_gate_register(void);
   5 static struct vg_shader _shader_gate = {
   6    .name = "gate",
   7    .link = shader_gate_link,
   8    .vs =
   9 {
  10 .orig_file = "../shaders/gate.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 "uniform mat4 uPv;\n"
  19 "uniform mat4x3 uMdl;\n"
  20 "\n"
  21 "out vec3 aNorm;\n"
  22 "out vec2 aUv;\n"
  23 "out vec3 aCo;\n"
  24 "\n"
  25 "void main()\n"
  26 "{\n"
  27 "   vec3 world_pos = uMdl * vec4( a_co, 1.0 );\n"
  28 "   gl_Position = uPv * vec4(world_pos,1.0);\n"
  29 "\n"
  30 "   aNorm = a_norm;\n"
  31 "   aCo = world_pos;\n"
  32 "   aUv = a_uv;\n"
  33 "}\n"
  34 ""},
  35    .fs =
  36 {
  37 .orig_file = "../shaders/gate.fs",
  38 .static_src =
  39 "out vec4 FragColor;\n"
  40 "\n"
  41 "uniform sampler2D uTexMain;\n"
  42 "uniform sampler2D uTexWater;\n"
  43 "uniform vec2 uInvRes;\n"
  44 "uniform float uTime;\n"
  45 "uniform vec3 uCam;\n"
  46 "\n"
  47 "in vec3 aNorm;\n"
  48 "in vec2 aUv;\n"
  49 "in vec3 aCo;\n"
  50 "\n"
  51 "void main()\n"
  52 "{\n"
  53 "   vec2 ssuv = gl_FragCoord.xy*uInvRes;\n"
  54 "   vec4 mapwater = texture( uTexWater, vec2(aUv.x,aUv.y-uTime));\n"
  55 "\n"
  56 "   float undistort = smoothstep(0.1,0.6,distance( uCam, aCo )*0.1);\n"
  57 "   vec2 trimedge = smoothstep(0.0,0.2,1.0-abs(ssuv-0.5)*2.0);\n"
  58 "   undistort *= trimedge.x * trimedge.y;\n"
  59 "\n"
  60 "   vec2 warpamt = (mapwater.rg-0.5)*0.05*aUv.y*undistort;\n"
  61 "   vec4 mapbackbuffer = texture( uTexMain, ssuv + warpamt );\n"
  62 "\n"
  63 "   float opacity = 1.0-smoothstep(0.4,1.0,aUv.y);\n"
  64 "   FragColor = vec4( mapbackbuffer.rgb, opacity );\n"
  65 "}\n"
  66 ""},
  67 };
  68
  69 static GLuint _uniform_gate_uPv;
  70 static GLuint _uniform_gate_uMdl;
  71 static GLuint _uniform_gate_uTexMain;
  72 static GLuint _uniform_gate_uTexWater;
  73 static GLuint _uniform_gate_uInvRes;
  74 static GLuint _uniform_gate_uTime;
  75 static GLuint _uniform_gate_uCam;
  76 static void shader_gate_uPv(m4x4f m){
  77    glUniformMatrix4fv( _uniform_gate_uPv, 1, GL_FALSE, (float *)m );
  78 }
  79 static void shader_gate_uMdl(m4x3f m){
  80    glUniformMatrix4x3fv( _uniform_gate_uMdl, 1, GL_FALSE, (float *)m );
  81 }
  82 static void shader_gate_uTexMain(int i){
  83    glUniform1i( _uniform_gate_uTexMain, i );
  84 }
  85 static void shader_gate_uTexWater(int i){
  86    glUniform1i( _uniform_gate_uTexWater, i );
  87 }
  88 static void shader_gate_uInvRes(v2f v){
  89    glUniform2fv( _uniform_gate_uInvRes, 1, v );
  90 }
  91 static void shader_gate_uTime(float f){
  92    glUniform1f( _uniform_gate_uTime, f );
  93 }
  94 static void shader_gate_uCam(v3f v){
  95    glUniform3fv( _uniform_gate_uCam, 1, v );
  96 }
  97 static void shader_gate_register(void){
  98    vg_shader_register( &_shader_gate );
  99 }
 100 static void shader_gate_use(void){ glUseProgram(_shader_gate.id); }
 101 static void shader_gate_link(void){
 102    _uniform_gate_uPv = glGetUniformLocation( _shader_gate.id, "uPv" );
 103    _uniform_gate_uMdl = glGetUniformLocation( _shader_gate.id, "uMdl" );
 104    _uniform_gate_uTexMain = glGetUniformLocation( _shader_gate.id, "uTexMain" );
 105    _uniform_gate_uTexWater = glGetUniformLocation( _shader_gate.id, "uTexWater" );
 106    _uniform_gate_uInvRes = glGetUniformLocation( _shader_gate.id, "uInvRes" );
 107    _uniform_gate_uTime = glGetUniformLocation( _shader_gate.id, "uTime" );
 108    _uniform_gate_uCam = glGetUniformLocation( _shader_gate.id, "uCam" );
 109 }
 110 #endif /* SHADER_gate_H */