static void
Init(void)
{
if (!ShadersSupported())
exit(1);
vertShader = CompileShaderText(GL_VERTEX_SHADER, VertShaderText);
fragShader = CompileShaderText(GL_FRAGMENT_SHADER, FragShaderText);
program = LinkShaders(vertShader, fragShader);
glUseProgram(program);
SetUniformValues(program, Uniforms);
PrintUniforms(Uniforms);
assert(glGetError() == 0);
glClearColor(0.4f, 0.4f, 0.8f, 0.0f);
printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
assert(glIsProgram(program));
assert(glIsShader(fragShader));
assert(glIsShader(vertShader));
glColor3f(1, 0, 0);
}
static void
Init(void)
{
static const char *fragShaderText =
"void main() {\n"
" gl_FragColor = vec4(1.0,0.0,0.0,1.0);\n"
"}\n";
static const char *vertShaderText =
"void main() {\n"
" gl_Position = gl_Vertex;\n"
"}\n";
if (!ShadersSupported())
exit(1);
fragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
vertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
program = LinkShaders(vertShader, fragShader);
glUseProgram(program);
assert(glGetError() == 0);
glClearColor(0.3f, 0.3f, 0.3f, 1.0f);
printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
assert(glIsProgram(program));
assert(glIsShader(fragShader));
assert(glIsShader(vertShader));
glColor3f(1, 0, 0);
}
static void
Init(void)
{
/* Fragment shader: modulate raster color by texture, discard fragments
* with alpha < 1.0
*/
static const char *fragShaderText =
"uniform sampler2D tex2d; \n"
"void main() {\n"
" vec4 c = texture2D(tex2d, gl_TexCoord[0].xy); \n"
" if (c.w < 1.0) \n"
" discard; \n"
" gl_FragColor = c * gl_Color; \n"
"}\n";
/* Vertex shader: compute new vertex position based on incoming vertex pos,
* texcoords and special scale factor.
*/
static const char *vertShaderText =
"uniform vec2 scale; \n"
"void main() {\n"
" vec4 p = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
" gl_Position.xy = p.xy + gl_MultiTexCoord0.xy * scale * p.w; \n"
" gl_Position.zw = p.zw; \n"
" gl_TexCoord[0] = gl_MultiTexCoord0; \n"
" gl_FrontColor = gl_Color; \n"
"}\n";
if (!ShadersSupported())
exit(1);
VertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
FragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
Program = LinkShaders(VertShader, FragShader);
glUseProgram(Program);
uScale = glGetUniformLocation(Program, "scale");
uTex = glGetUniformLocation(Program, "tex2d");
if (uTex != -1) {
glUniform1i(uTex, 0); /* tex unit 0 */
}
glUseProgram(0);
glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_NORMALIZE);
glEnable(GL_LIGHT0);
MakeBitmapTextures();
}
/**
* Read a shader from a file.
*/
GLuint
CompileShaderFile(GLenum shaderType, const char *filename)
{
const int max = 100*1000;
int n;
char *buffer = (char*) malloc(max);
GLuint shader;
FILE *f;
Init();
f = fopen(filename, "r");
if (!f) {
fprintf(stderr, "Unable to open shader file %s\n", filename);
return 0;
}
n = fread(buffer, 1, max, f);
/*printf("read %d bytes from shader file %s\n", n, filename);*/
if (n > 0) {
buffer[n] = 0;
shader = CompileShaderText(shaderType, buffer);
}
else {
return 0;
}
fclose(f);
free(buffer);
return shader;
}
static void
Init(void)
{
static const char *fragShaderText =
"uniform ivec2 WinSize; \n"
"void main() {\n"
" vec2 d = dFdy(gl_TexCoord[0].xy) * vec2(WinSize); \n"
" gl_FragColor = vec4(d.x, d.y, 0.0, 1.0);\n"
" // gl_FragColor = gl_TexCoord[0];\n"
"}\n";
static const char *vertShaderText =
"void main() {\n"
" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
" gl_TexCoord[0] = gl_MultiTexCoord0;\n"
"}\n";
if (!ShadersSupported())
exit(1);
vertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
fragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
program = LinkShaders(vertShader, fragShader);
glUseProgram(program);
WinSizeUniform = glGetUniformLocation(program, "WinSize");
/*assert(glGetError() == 0);*/
glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
glEnable(GL_DEPTH_TEST);
MakeSphere();
MakeRect();
CurList = SphereList;
printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
assert(glIsProgram(program));
assert(glIsShader(fragShader));
assert(glIsShader(vertShader));
glColor3f(1, 0, 0);
}
static void
Init(void)
{
static const char *fragShaderText =
"uniform float StipplePattern[16]; \n"
"varying float stippleCoord; \n"
"void main() \n"
"{ \n"
" // check the stipple pattern and discard if value is zero \n"
" // TODO: we should really undo the perspective interpolation here \n"
" // so that it's linear. \n"
" float stip = StipplePattern[int(fract(stippleCoord) * 16.0)]; \n"
" if (stip == 0.0) \n"
" discard; \n"
" gl_FragColor = gl_Color; \n"
"} \n";
static const char *vertShaderText =
"void main() \n"
"{ \n"
" gl_FrontColor = gl_Color; \n"
" gl_Position = ftransform(); \n"
"} \n";
static const char *geomShaderText =
"#version 120 \n"
"#extension GL_ARB_geometry_shader4: enable \n"
"uniform vec2 ViewportSize; \n"
"uniform float StippleFactor; \n"
"varying float stippleCoord; \n"
"void main() \n"
"{ \n"
" vec4 pos0 = gl_PositionIn[0]; \n"
" vec4 pos1 = gl_PositionIn[1]; \n"
" // Convert eye coords to window coords \n"
" // Note: we're off by a factor of two here, make up for that below \n"
" vec2 p0 = pos0.xy / pos0.w * ViewportSize; \n"
" vec2 p1 = pos1.xy / pos1.w * ViewportSize; \n"
" float len = length(p0.xy - p1.xy); \n"
" // Emit first vertex \n"
" gl_FrontColor = gl_FrontColorIn[0]; \n"
" gl_Position = pos0; \n"
" stippleCoord = 0.0; \n"
" EmitVertex(); \n"
" // Emit second vertex \n"
" gl_FrontColor = gl_FrontColorIn[1]; \n"
" gl_Position = pos1; \n"
" stippleCoord = len / StippleFactor / 32.0; // Note: not 16, see above \n"
" EmitVertex(); \n"
"} \n";
if (!ShadersSupported())
exit(1);
if (!glutExtensionSupported("GL_ARB_geometry_shader4")) {
fprintf(stderr, "Sorry, GL_ARB_geometry_shader4 is not supported.\n");
exit(1);
}
VertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
FragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
GeomShader = CompileShaderText(GL_GEOMETRY_SHADER_ARB, geomShaderText);
assert(GeomShader);
Program = LinkShaders3(VertShader, GeomShader, FragShader);
assert(Program);
CheckError(__LINE__);
/*
* The geometry shader accepts lines and produces lines.
*/
glProgramParameteriARB(Program, GL_GEOMETRY_INPUT_TYPE_ARB,
GL_LINES);
glProgramParameteriARB(Program, GL_GEOMETRY_OUTPUT_TYPE_ARB,
GL_LINE_STRIP);
glProgramParameteriARB(Program, GL_GEOMETRY_VERTICES_OUT_ARB, 4);
CheckError(__LINE__);
glLinkProgramARB(Program);
/* check link */
{
GLint stat;
GetProgramiv(Program, GL_LINK_STATUS, &stat);
if (!stat) {
GLchar log[1000];
GLsizei len;
GetProgramInfoLog(Program, 1000, &len, log);
fprintf(stderr, "Shader link error:\n%s\n", log);
}
}
glUseProgram(Program);
uViewportSize = glGetUniformLocation(Program, "ViewportSize");
uStippleFactor = glGetUniformLocation(Program, "StippleFactor");
uStipplePattern = glGetUniformLocation(Program, "StipplePattern");
glUniform1f(uStippleFactor, StippleFactor);
glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
assert(glIsProgram(Program));
assert(glIsShader(FragShader));
assert(glIsShader(VertShader));
assert(glIsShader(GeomShader));
glLineStipple(StippleFactor, StipplePattern);
SetStippleUniform(StippleFactor, StipplePattern);
MakePointsVBO();
}
static void
Init(void)
{
static const char *fragShaderText =
"void main() \n"
"{ \n"
" gl_FragColor = gl_Color; \n"
"} \n";
static const char *vertShaderText =
"void main() \n"
"{ \n"
" gl_FrontColor = gl_Color; \n"
" gl_Position = ftransform(); \n"
"} \n";
static const char *geomShaderText =
"#version 120 \n"
"#extension GL_ARB_geometry_shader4: enable \n"
"uniform vec2 InverseViewportSize; \n"
"uniform float LineWidth; \n"
"void main() \n"
"{ \n"
" vec4 pos0 = gl_PositionIn[0]; \n"
" vec4 pos1 = gl_PositionIn[1]; \n"
" vec4 dir = abs(pos1 - pos0); \n"
" vec2 d0 = vec2(LineWidth * pos0.w) * InverseViewportSize; \n"
" vec2 d1 = vec2(LineWidth * pos1.w) * InverseViewportSize; \n"
" // this conditional could be avoided \n"
" if (dir.x > dir.y) { \n"
" // X-major line \n"
" d0.x = 0.0; \n"
" d1.x = 0.0; \n"
" } \n"
" else { \n"
" // Y-major line \n"
" d0.y = 0.0; \n"
" d1.y = 0.0; \n"
" } \n"
" gl_FrontColor = gl_FrontColorIn[0]; \n"
" gl_TexCoord[0] = vec4(0, 0, 0, 1); \n"
" gl_Position = pos0 + vec4( d0.x, -d0.y, 0, 0); \n"
" EmitVertex(); \n"
" gl_FrontColor = gl_FrontColorIn[1]; \n"
" gl_TexCoord[0] = vec4(1, 0, 0, 1); \n"
" gl_Position = pos1 + vec4( d1.x, -d1.y, 0, 0); \n"
" EmitVertex(); \n"
" gl_FrontColor = gl_FrontColorIn[0]; \n"
" gl_TexCoord[0] = vec4(0, 1, 0, 1); \n"
" gl_Position = pos0 + vec4(-d0.x, d0.y, 0, 0); \n"
" EmitVertex(); \n"
" gl_FrontColor = gl_FrontColorIn[1]; \n"
" gl_TexCoord[0] = vec4(1, 1, 0, 1); \n"
" gl_Position = pos1 + vec4(-d1.x, d1.y, 0, 0); \n"
" EmitVertex(); \n"
"} \n";
if (!ShadersSupported())
exit(1);
if (!glutExtensionSupported("GL_ARB_geometry_shader4")) {
fprintf(stderr, "Sorry, GL_ARB_geometry_shader4 is not supported.\n");
exit(1);
}
VertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
FragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
GeomShader = CompileShaderText(GL_GEOMETRY_SHADER_ARB, geomShaderText);
assert(GeomShader);
Program = LinkShaders3(VertShader, GeomShader, FragShader);
assert(Program);
CheckError(__LINE__);
/*
* The geometry shader will convert incoming lines to quads (4-vertex
* triangle strips).
*/
glProgramParameteriARB(Program, GL_GEOMETRY_INPUT_TYPE_ARB,
GL_LINES);
glProgramParameteriARB(Program, GL_GEOMETRY_OUTPUT_TYPE_ARB,
GL_TRIANGLE_STRIP);
glProgramParameteriARB(Program,GL_GEOMETRY_VERTICES_OUT_ARB, 4);
CheckError(__LINE__);
glLinkProgramARB(Program);
/* check link */
{
GLint stat;
GetProgramiv(Program, GL_LINK_STATUS, &stat);
if (!stat) {
GLchar log[1000];
GLsizei len;
GetProgramInfoLog(Program, 1000, &len, log);
fprintf(stderr, "Shader link error:\n%s\n", log);
}
}
CheckError(__LINE__);
glUseProgram(Program);
CheckError(__LINE__);
uInverseViewportSize = glGetUniformLocation(Program, "InverseViewportSize");
uLineWidth = glGetUniformLocation(Program, "LineWidth");
glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
assert(glIsProgram(Program));
assert(glIsShader(FragShader));
assert(glIsShader(VertShader));
assert(glIsShader(GeomShader));
glEnable(GL_DEPTH_TEST);
{
GLfloat r[2];
glGetFloatv(GL_LINE_WIDTH_RANGE, r);
MaxLineWidth = r[1];
}
MakePointsVBO();
}
void UpdateOCIOGLState()
{
// Step 0: Get the processor using any of the pipelines mentioned above.
OCIO::ConstConfigRcPtr config = OCIO::GetCurrentConfig();
OCIO::DisplayTransformRcPtr transform = OCIO::DisplayTransform::Create();
transform->setInputColorSpaceName( g_inputColorSpace.c_str() );
transform->setDisplay( g_display.c_str() );
transform->setView( g_transformName.c_str() );
// Add optional transforms to create a full-featured, "canonical" display pipeline
// Fstop exposure control (in SCENE_LINEAR)
{
float gain = powf(2.0f, g_exposure_fstop);
const float slope4f[] = { gain, gain, gain, gain };
float m44[16];
float offset4[4];
OCIO::MatrixTransform::Scale(m44, offset4, slope4f);
OCIO::MatrixTransformRcPtr mtx = OCIO::MatrixTransform::Create();
mtx->setValue(m44, offset4);
transform->setLinearCC(mtx);
}
// Channel swizzling
{
float lumacoef[3];
config->getDefaultLumaCoefs(lumacoef);
float m44[16];
float offset[4];
OCIO::MatrixTransform::View(m44, offset, g_channelHot, lumacoef);
OCIO::MatrixTransformRcPtr swizzle = OCIO::MatrixTransform::Create();
swizzle->setValue(m44, offset);
transform->setChannelView(swizzle);
}
// Post-display transform gamma
{
float exponent = 1.0f/std::max(1e-6f, static_cast<float>(g_display_gamma));
const float exponent4f[] = { exponent, exponent, exponent, exponent };
OCIO::ExponentTransformRcPtr expTransform = OCIO::ExponentTransform::Create();
expTransform->setValue(exponent4f);
transform->setDisplayCC(expTransform);
}
OCIO::ConstProcessorRcPtr processor;
try
{
processor = config->getProcessor(transform);
}
catch(OCIO::Exception & e)
{
std::cerr << e.what() << std::endl;
return;
}
catch(...)
{
return;
}
// Step 1: Create a GPU Shader Description
OCIO::GpuShaderDesc shaderDesc;
shaderDesc.setLanguage(OCIO::GPU_LANGUAGE_GLSL_1_0);
shaderDesc.setFunctionName("OCIODisplay");
shaderDesc.setLut3DEdgeLen(LUT3D_EDGE_SIZE);
// Step 2: Compute the 3D LUT
std::string lut3dCacheID = processor->getGpuLut3DCacheID(shaderDesc);
if(lut3dCacheID != g_lut3dcacheid)
{
//std::cerr << "Computing 3DLut " << g_lut3dcacheid << std::endl;
g_lut3dcacheid = lut3dCacheID;
processor->getGpuLut3D(&g_lut3d[0], shaderDesc);
glBindTexture(GL_TEXTURE_3D, g_lut3dTexID);
glTexSubImage3D(GL_TEXTURE_3D, 0,
0, 0, 0,
LUT3D_EDGE_SIZE, LUT3D_EDGE_SIZE, LUT3D_EDGE_SIZE,
GL_RGB,GL_FLOAT, &g_lut3d[0]);
}
// Step 3: Compute the Shader
std::string shaderCacheID = processor->getGpuShaderTextCacheID(shaderDesc);
if(g_program == 0 || shaderCacheID != g_shadercacheid)
{
//std::cerr << "Computing Shader " << g_shadercacheid << std::endl;
g_shadercacheid = shaderCacheID;
std::ostringstream os;
os << processor->getGpuShaderText(shaderDesc) << "\n";
os << g_fragShaderText;
//std::cerr << os.str() << std::endl;
if(g_fragShader) glDeleteShader(g_fragShader);
g_fragShader = CompileShaderText(GL_FRAGMENT_SHADER, os.str().c_str());
if(g_program) glDeleteProgram(g_program);
g_program = LinkShaders(g_fragShader);
}
glUseProgram(g_program);
glUniform1i(glGetUniformLocation(g_program, "tex1"), 1);
glUniform1i(glGetUniformLocation(g_program, "tex2"), 2);
}
static void
Init(void)
{
const GLubyte *version;
static const char *vertShaderText =
"#version 150 \n"
"uniform mat4 ModelViewProjection; \n"
"in vec4 Vertex; \n"
"void main() \n"
"{ \n"
" gl_Position = ModelViewProjection * Vertex; \n"
"} \n";
static const char *geomShaderText =
"#version 150 \n"
"layout(triangles) in; \n"
"layout(triangle_strip, max_vertices = 3) out; \n"
"uniform vec2 ViewportSize; \n"
"out vec2 Vert0, Vert1, Vert2; \n"
"\n"
"// Transform NDC coord to window coord \n"
"vec2 vpxform(vec4 p) \n"
"{ \n"
" return (p.xy / p.w + 1.0) * 0.5 * ViewportSize; \n"
"} \n"
"\n"
"void main() \n"
"{ \n"
" Vert0 = vpxform(gl_in[0].gl_Position); \n"
" Vert1 = vpxform(gl_in[1].gl_Position); \n"
" Vert2 = vpxform(gl_in[2].gl_Position); \n"
" gl_Position = gl_in[0].gl_Position; \n"
" EmitVertex(); \n"
" gl_Position = gl_in[1].gl_Position; \n"
" EmitVertex(); \n"
" gl_Position = gl_in[2].gl_Position; \n"
" EmitVertex(); \n"
"} \n";
static const char *fragShaderText =
"#version 150 \n"
"#define LINE_WIDTH 2.5 \n"
"uniform vec4 Color; \n"
"in vec2 Vert0, Vert1, Vert2; \n"
"out vec4 FragColor; \n"
"// Compute distance from a point to a line \n"
"float point_line_dist(vec2 p, vec2 v1, vec2 v2) \n"
"{ \n"
" float s = (v2.x - v1.x) * (v1.y - p.y) - (v1.x - p.x) * (v2.y - v1.y); \n"
" float t = length(v2 - v1); \n"
" return abs(s) / t; \n"
"} \n"
"\n"
"void main() \n"
"{ \n"
" float d0 = point_line_dist(gl_FragCoord.xy, Vert0, Vert1); \n"
" float d1 = point_line_dist(gl_FragCoord.xy, Vert1, Vert2); \n"
" float d2 = point_line_dist(gl_FragCoord.xy, Vert2, Vert0); \n"
" float m = min(d0, min(d1, d2)); \n"
" FragColor = Color * smoothstep(0.0, LINE_WIDTH, m); \n"
"} \n";
static const GLfloat verts[3][2] = {
{ -1, -1 },
{ 1, -1 },
{ 0, 1 }
};
if (!ShadersSupported())
exit(1);
if (!GLEW_VERSION_3_2) {
fprintf(stderr, "Sorry, OpenGL 3.2 or later required.\n");
exit(1);
}
VertShader = CompileShaderText(GL_VERTEX_SHADER, vertShaderText);
FragShader = CompileShaderText(GL_FRAGMENT_SHADER, fragShaderText);
GeomShader = CompileShaderText(GL_GEOMETRY_SHADER, geomShaderText);
Program = LinkShaders3(VertShader, GeomShader, FragShader);
assert(Program);
CheckError(__LINE__);
glBindAttribLocation(Program, 0, "Vertex");
glBindFragDataLocation(Program, 0, "FragColor");
/* relink */
glLinkProgram(Program);
assert(glIsProgram(Program));
assert(glIsShader(FragShader));
assert(glIsShader(VertShader));
assert(glIsShader(GeomShader));
glUseProgram(Program);
uViewportSize = glGetUniformLocation(Program, "ViewportSize");
uModelViewProj = glGetUniformLocation(Program, "ModelViewProjection");
uColor = glGetUniformLocation(Program, "Color");
glUniform4fv(uColor, 1, Orange);
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, NULL);
glEnableVertexAttribArray(0);
glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
glEnable(GL_DEPTH_TEST);
printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
}
void
glmShaderMaterial(GLMmaterial *mat)
{
static const float ambientLight[4] = { 0.1, 0.1, 0.1, 0.0 };
static const float diffuseLight[4] = { 0.75, 0.75, 0.75, 1.0 };
static const float specularLight[4] = { 1.0, 1.0, 1.0, 0.0 };
if (!mat->prog) {
/* make shader now */
char newShader[10000];
GLuint vs, fs;
const char *diffuseTex = mat->texture_kd ? "true" : "false";
const char *specularTex = mat->texture_ks ? "true" : "false";
GLint uAmbientLight, uDiffuseLight, uSpecularLight;
/* replace %d with 0 or 1 */
sprintf(newShader, TexFragmentShader, diffuseTex, specularTex);
if (0)
printf("===== new shader =====\n%s\n============\n", newShader);
vs = CompileShaderText(GL_VERTEX_SHADER, VertexShader);
fs = CompileShaderText(GL_FRAGMENT_SHADER, newShader);
mat->prog = LinkShaders(vs, fs);
assert(mat->prog);
glUseProgram(mat->prog);
mat->uAmbient = glGetUniformLocation(mat->prog, "ambient");
mat->uDiffuse = glGetUniformLocation(mat->prog, "diffuse");
mat->uSpecular = glGetUniformLocation(mat->prog, "specular");
mat->uShininess = glGetUniformLocation(mat->prog, "shininess");
mat->uDiffTex = glGetUniformLocation(mat->prog, "diffTex");
mat->uSpecTex = glGetUniformLocation(mat->prog, "specTex");
uAmbientLight = glGetUniformLocation(mat->prog, "ambientLight");
uDiffuseLight = glGetUniformLocation(mat->prog, "diffuseLight");
uSpecularLight = glGetUniformLocation(mat->prog, "specularLight");
glUniform4fv(mat->uAmbient, 1, mat->ambient);
glUniform4fv(mat->uDiffuse, 1, mat->diffuse);
glUniform4fv(mat->uSpecular, 1, mat->specular);
glUniform1f(mat->uShininess, mat->shininess);
glUniform1i(mat->uDiffTex, 0);
glUniform1i(mat->uSpecTex, 1);
glUniform4fv(uAmbientLight, 1, ambientLight);
glUniform4fv(uDiffuseLight, 1, diffuseLight);
glUniform4fv(uSpecularLight, 1, specularLight);
}
glActiveTexture(GL_TEXTURE1);
if (mat->texture_ks)
glBindTexture(GL_TEXTURE_CUBE_MAP, mat->texture_ks);
else
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
glActiveTexture(GL_TEXTURE0);
if (mat->texture_kd)
glBindTexture(GL_TEXTURE_2D, mat->texture_kd);
else
glBindTexture(GL_TEXTURE_2D, 0);
if (mat->diffuse[3] < 1.0) {
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
else {
glDisable(GL_BLEND);
}
glUseProgram(mat->prog);
}