parent
d493d60fe5
commit
173ac6e344
@ -0,0 +1,159 @@ |
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<Platform>Win32</Platform> |
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<Configuration>Debug</Configuration> |
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<Platform>x64</Platform> |
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<ProjectConfiguration Include="Release|x64"> |
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<Configuration>Release</Configuration> |
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<Platform>x64</Platform> |
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<PropertyGroup Label="Globals"> |
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<ItemGroup> |
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<ClInclude Include="utils.h" /> |
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</ItemGroup> |
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<ItemGroup> |
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<None Include="fragShader.glsl" /> |
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<None Include="vertShader.glsl" /> |
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</ImportGroup> |
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</Project> |
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@ -0,0 +1,39 @@ |
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#pragma once |
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#include <GL/glew.h> |
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#include <cstdlib> |
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#include <iostream> |
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|
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namespace ErrorCheck{ |
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inline void printShaderLog(GLuint shader) { |
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int len = 0; |
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int chWrittn = 0; |
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char *log; |
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glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &len); |
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if (len > 0) { |
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log = (char *)malloc(len); |
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glGetShaderInfoLog(shader, len, &chWrittn, log); |
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std::cout << "Shader Info Log: " << log << std::endl; |
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free(log); |
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} } |
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inline void printProgramLog(int prog) { |
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int len = 0; |
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int chWrittn = 0; |
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char *log; |
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glGetProgramiv(prog, GL_INFO_LOG_LENGTH, &len); |
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if (len > 0) { |
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log = (char *)malloc(len); |
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glGetProgramInfoLog(prog, len, &chWrittn, log); |
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std::cout << "Program Info Log: " << log << std::endl; |
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free(log); |
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} } |
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inline bool checkOpenGLError() { |
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bool foundError = false; |
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int glErr = glGetError(); |
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while (glErr != GL_NO_ERROR) { |
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std::cout << "glError: " << glErr << std::endl; |
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foundError = true; |
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glErr = glGetError(); |
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} |
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return foundError; |
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} |
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} |
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@ -0,0 +1,11 @@ |
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#version 430 |
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out vec4 color; |
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void main(void) |
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{ |
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color=vec4( |
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(gl_FragCoord.x) / 600.f, |
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0.0, |
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1-(gl_FragCoord.x) / 600.f, |
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1.0 |
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); |
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} |
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Binary file not shown.
@ -0,0 +1,57 @@ |
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#include <GL/glew.h> |
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#include <GLFW/glfw3.h> |
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#include "utils.h" |
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#include <algorithm> |
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|
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#define numVAOs 1 |
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|
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GLuint renderingProgram; |
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GLuint vao[numVAOs]; |
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|
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void init(GLFWwindow* window) { |
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renderingProgram=utils::createShaderProgram("vertShader.glsl","fragShader.glsl"); |
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glGenVertexArrays(numVAOs,vao); |
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glBindVertexArray(vao[0]); |
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} |
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|
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float size=0; |
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float inc=150; |
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double lastTime=0; |
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|
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void display(GLFWwindow* window, double currentTime) { |
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double elapsedTime=currentTime-lastTime; |
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lastTime=currentTime; |
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|
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glClear(GL_DEPTH_BUFFER_BIT); |
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glClearColor(0,0,0.2,1); |
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glClear(GL_COLOR_BUFFER_BIT); |
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|
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glUseProgram(renderingProgram); |
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size+=inc*elapsedTime; |
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if(size>300||size<1){inc*=-1;size=std::clamp(size,1.f,300.f);} |
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glPointSize(size); |
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|
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glDrawArrays(GL_POINTS,0,1); |
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} |
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|
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int main(void) { |
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if (!glfwInit()) { exit(EXIT_FAILURE); } |
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glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4); |
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glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3); |
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GLFWwindow* window = glfwCreateWindow(300, 300, "Expanding Dot", NULL, NULL); |
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glfwMakeContextCurrent(window); |
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if (glewInit() != GLEW_OK) { exit(EXIT_FAILURE); } |
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glfwSwapInterval(1); |
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|
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init(window); |
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|
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while (!glfwWindowShouldClose(window)) { |
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display(window,glfwGetTime()); |
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glfwSwapBuffers(window); |
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glfwPollEvents(); |
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} |
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|
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glfwDestroyWindow(window); |
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glfwTerminate(); |
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exit(EXIT_SUCCESS); |
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} |
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@ -0,0 +1,74 @@ |
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#pragma once |
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#include <string> |
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#include <fstream> |
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#include <GL/glew.h> |
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#include "ShaderError.h" |
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|
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class utils{ |
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inline static std::string readShaderSource(const char *filePath){ |
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std::string content; |
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std::ifstream fileStream(filePath, std::ios::in); |
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std::string line = ""; |
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if(fileStream.fail()){ |
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std::cout<<"Could not open shader "<<filePath<<"!"<<std::endl; |
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throw; |
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} |
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while (fileStream.good()) { |
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getline(fileStream, line); |
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content.append(line + "\n"); |
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} |
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fileStream.close(); |
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return content; |
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} |
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inline static void CompileShader(GLuint shader,std::string type){ |
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GLint compiled; |
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glCompileShader(shader); |
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ErrorCheck::checkOpenGLError(); |
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glGetShaderiv(shader,GL_COMPILE_STATUS,&compiled); |
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if(compiled!=1){ |
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std::cout<<type<<" Compilation Failed!"<<std::endl; |
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ErrorCheck::printShaderLog(shader); |
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throw; |
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} |
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} |
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inline static void CreateShader(GLuint type,std::string shaderName,const char*source,GLuint vfProgram){ |
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if(source!=nullptr){ |
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GLuint vShader=glCreateShader(type); |
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std::string shaderFile=readShaderSource(source); |
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const char*vertShaderSrc=shaderFile.c_str(); |
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glShaderSource(vShader,1,&vertShaderSrc,NULL); |
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CompileShader(vShader,shaderName); |
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glAttachShader(vfProgram,vShader); |
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} |
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}; |
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public: |
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inline static GLuint createShaderProgram(const char*vertex,const char*fragment){ |
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return createShaderProgram(vertex,nullptr,nullptr,nullptr,fragment); |
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} |
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inline static GLuint createShaderProgram(const char*vertex,const char*geometry,const char*fragment){ |
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return createShaderProgram(vertex,nullptr,nullptr,geometry,fragment); |
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} |
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inline static GLuint createShaderProgram(const char*vertex,const char*tesselationCS,const char*tesselationES,const char*fragment){ |
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return createShaderProgram(vertex,tesselationCS,tesselationES,nullptr,fragment); |
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} |
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inline static GLuint createShaderProgram(const char*vertex,const char*tesselationCS,const char*tesselationES,const char*geometry,const char*fragment){ |
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|
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GLuint vfProgram=glCreateProgram(); |
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|
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CreateShader(GL_VERTEX_SHADER,"Vertex",vertex,vfProgram); |
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CreateShader(GL_FRAGMENT_SHADER,"Fragment",fragment,vfProgram); |
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CreateShader(GL_TESS_CONTROL_SHADER,"Tesselation Control",tesselationCS,vfProgram); |
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CreateShader(GL_TESS_EVALUATION_SHADER,"Tesselation Evaluation",tesselationES,vfProgram); |
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CreateShader(GL_GEOMETRY_SHADER,"Geometry",geometry,vfProgram); |
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|
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GLint linked; |
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glLinkProgram(vfProgram); |
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ErrorCheck::checkOpenGLError(); |
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glGetProgramiv(vfProgram,GL_LINK_STATUS,&linked); |
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if(linked!=1){ |
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std::cout<<"Linking Failed!"<<std::endl; |
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ErrorCheck::printProgramLog(vfProgram); |
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} |
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return vfProgram; |
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} |
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}; |
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@ -0,0 +1,5 @@ |
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#version 430 |
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void main(void) |
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{ |
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gl_Position=vec4(0.0,0.0,0.0,1.0); |
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} |
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Reference in new issue