blinn-phong reference

gistfile1.txt

GLint uloc_MV, uloc_P, uloc_texDiff, uloc_texNorm, uloc_texSpec, uloc_lightPos, uloc_lightDir, uloc_lightDiff, uloc_lightSpec, uloc_amb, uloc_viewDir;
void GLdummyShaders() {
  const GLchar* vertsrc = "#version 150 core\n"
                          "in vec3 inPos;\n"
                          "in vec2 inTexCoord;\n"
                          "out vec3 pos;\n"
                          "out vec2 texCoord;\n"
                          "uniform mat3 MV;\n"
                          "uniform mat4 P;\n"
                          "void main() {\n"
                          "  pos = MV*inPos;\n"
                          "  texCoord = inTexCoord;\n"
                          "  gl_Position = P*vec4(pos, 1.0);\n"
                          "}";
  const GLchar* fragsrc = "#version 150 core\n"
                          "out vec4 outColor;\n"
                          "smooth in vec3 pos;\n"
                          "in vec2 texCoord;\n"
                          "uniform sampler2D texDiff;\n"
                          "uniform sampler2D texNorm;\n"
                          "uniform sampler2D texSpec;\n"
                          "uniform vec3 lightPos;\n"
                          "uniform vec3 lightDir;\n"
                          "uniform vec3 lightDiff;\n"
                          "uniform vec3 lightSpec;\n"
                          "uniform vec3 amb;\n"
                          "uniform vec3 viewDir;\n"
                          "void main() {\n"
                          "  float dist = length(lightPos - pos);\n"
                          "  vec3 norm = texture(texNorm, texCoord).xyz;\n"
                          "  vec3 diff = max(0.0, dot(lightDir, norm))*lightDiff*texture(texDiff, texCoord).rgb;\n"
                          "  vec3 spec = pow(dot(norm, normalize(lightDir+viewDir)), texture(texSpec, texCoord).r)*lightSpec;\n"
                          "  outColor = vec4(amb + diff + spec, 1.0);\n"
                          "}";
  int vertid = glCreateShader(GL_VERTEX_SHADER);
  int fragid = glCreateShader(GL_FRAGMENT_SHADER);
  glShaderSource(vertid, 1, &vertsrc, NULL);
  glCompileShader(vertid);
  glShaderSource(fragid, 1, &fragsrc, NULL);
  glCompileShader(fragid);
  int progid = glCreateProgram();
  glAttachShader(progid, vertid);
  glAttachShader(progid, fragid);
  glBindAttribLocation(progid, 0, "inPos");
  glBindAttribLocation(progid, 1, "inTexCoord");
  glLinkProgram(progid);
 
  uloc_MV = glGetUniformLocation(progid, "MV");
  uloc_P = glGetUniformLocation(progid, "P");
  uloc_texDiff = glGetUniformLocation(progid, "texDiff");
  uloc_texNorm = glGetUniformLocation(progid, "texNorm");
  uloc_texSpec = glGetUniformLocation(progid, "texSpec");
  uloc_lightPos = glGetUniformLocation(progid, "lightPos");
  uloc_lightDir = glGetUniformLocation(progid, "lightDir");
  uloc_lightDiff = glGetUniformLocation(progid, "lightDiff");
  uloc_lightSpec = glGetUniformLocation(progid, "lightSpec");
  uloc_amb = glGetUniformLocation(progid, "amb");
  uloc_viewDir = glGetUniformLocation(progid, "viewDir");
}