parent
836b249bc6
commit
a14516f74f
@ -0,0 +1,157 @@ |
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<ClCompile Include="main.cpp" /> |
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<ClCompile Include="Sphere.cpp" /> |
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<None Include="fragShader.glsl" /> |
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<None Include="vertShader.glsl" /> |
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</ItemGroup> |
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<ItemGroup> |
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<ClInclude Include="ShaderError.h" /> |
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<ClInclude Include="Sphere.h" /> |
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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 +1,57 @@ |
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#include <cmath> |
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#include <vector> |
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#include <iostream> |
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#include <glm/glm.hpp> |
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#include "Sphere.h" |
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using namespace std; |
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|
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Sphere::Sphere() { |
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init(48); |
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} |
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|
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Sphere::Sphere(int prec) { // prec is precision, or number of slices
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init(prec); |
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} |
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|
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float Sphere::toRadians(float degrees) { return (degrees*2.0f*3.14159f)/360.0f; } |
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|
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void Sphere::init(int prec) { |
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numVertices = (prec+1)*(prec+1); |
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numIndices = prec*prec*6; |
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for(int i = 0; i<numVertices; i++) { vertices.push_back(glm::vec3()); } // std::vector::push_back()
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for(int i = 0; i<numVertices; i++) { texCoords.push_back(glm::vec2()); } // inserts new element at
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for(int i = 0; i<numVertices; i++) { normals.push_back(glm::vec3()); } // the end of a vector and
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for(int i = 0; i<numIndices; i++) { indices.push_back(0); } // increases the vector size by 1
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|
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// calculate triangle vertices
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for(int i = 0; i<=prec; i++) { |
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for(int j = 0; j<=prec; j++) { |
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float y = (float)cos(toRadians(180.0f-i*180.0f/prec)); |
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float x = -(float)cos(toRadians(j*360.0f/prec))*(float)abs(cos(asin(y))); |
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float z = (float)sin(toRadians(j*360.0f/prec))*(float)abs(cos(asin(y))); |
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vertices[i*(prec+1)+j] = glm::vec3(x,y,z); |
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texCoords[i*(prec+1)+j] = glm::vec2(((float)j/prec),((float)i/prec)); |
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normals[i*(prec+1)+j] = glm::vec3(x,y,z); |
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} |
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} |
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|
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// calculate triangle indices
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for(int i = 0; i<prec; i++) { |
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for(int j = 0; j<prec; j++) { |
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indices[6*(i*prec+j)+0] = i*(prec+1)+j; |
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indices[6*(i*prec+j)+1] = i*(prec+1)+j+1; |
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indices[6*(i*prec+j)+2] = (i+1)*(prec+1)+j; |
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indices[6*(i*prec+j)+3] = i*(prec+1)+j+1; |
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indices[6*(i*prec+j)+4] = (i+1)*(prec+1)+j+1; |
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indices[6*(i*prec+j)+5] = (i+1)*(prec+1)+j; |
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} |
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} |
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} |
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|
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// accessors
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int Sphere::getNumVertices() { return numVertices; } |
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int Sphere::getNumIndices() { return numIndices; } |
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std::vector<int> Sphere::getIndices() { return indices; } |
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std::vector<glm::vec3> Sphere::getVertices() { return vertices; } |
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std::vector<glm::vec2> Sphere::getTexCoords() { return texCoords; } |
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std::vector<glm::vec3> Sphere::getNormals() { return normals; } |
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@ -0,0 +1,25 @@ |
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#include <cmath> |
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#include <vector> |
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#include <glm/glm.hpp> |
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|
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class Sphere{ |
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private: |
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int numVertices; |
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int numIndices; |
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std::vector<int> indices; |
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std::vector<glm::vec3> vertices; |
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std::vector<glm::vec2> texCoords; |
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std::vector<glm::vec3> normals; |
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void init(int); |
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float toRadians(float degrees); |
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|
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public: |
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Sphere(); |
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Sphere(int prec); |
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int getNumVertices(); |
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int getNumIndices(); |
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std::vector<int> getIndices(); |
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std::vector<glm::vec3> getVertices(); |
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std::vector<glm::vec2> getTexCoords(); |
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std::vector<glm::vec3> getNormals(); |
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}; |
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|
After Width: | Height: | Size: 180 KiB |
@ -0,0 +1,8 @@ |
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#version 430 |
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layout (binding=0) uniform sampler2D samp; |
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in vec2 uv; |
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out vec4 color; |
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void main(void) |
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{ |
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color=texture(samp,uv); |
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} |
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Binary file not shown.
|
After Width: | Height: | Size: 185 KiB |
@ -0,0 +1,147 @@ |
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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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#include <vector> |
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#include <glm/glm.hpp> |
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#include <glm/gtc/type_ptr.hpp> |
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#include <glm/gtc/matrix_transform.hpp> |
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#include <array> |
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#include <stack> |
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#include "Sphere.h" |
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|
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#define numVAOs 1 |
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#define numVBOs 3 |
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|
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GLuint renderingProgram; |
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GLuint vao[numVAOs]; |
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GLuint vbo[numVBOs]; |
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|
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glm::vec3 camera; |
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GLuint mvLoc,projLoc; |
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int width, height; |
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float aspect; |
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glm::mat4 mMat, pMat, vMat, mvMat; |
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std::stack<glm::mat4>transforms; |
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|
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GLuint pyrTex; |
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Sphere sphere(48); |
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|
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void setupVertices(void) { // 36 vertices, 12 triangles, makes 2x2x2 cube placed at origin
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|
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std::vector<int>indices=sphere.getIndices(); |
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std::vector<glm::vec3>vertices=sphere.getVertices(); |
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std::vector<glm::vec2>uvs=sphere.getTexCoords(); |
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std::vector<glm::vec3>normals=sphere.getNormals(); |
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|
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std::vector<float>pvalues; |
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std::vector<float>tvalues; |
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std::vector<float>nvalues; |
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for(int i=0;i<sphere.getNumIndices();i++){ |
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pvalues.push_back(vertices[indices[i]].x); |
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pvalues.push_back(vertices[indices[i]].y); |
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pvalues.push_back(vertices[indices[i]].z); |
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tvalues.push_back(uvs[indices[i]].s); |
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tvalues.push_back(uvs[indices[i]].t); |
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nvalues.push_back(normals[indices[i]].x); |
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nvalues.push_back(normals[indices[i]].y); |
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nvalues.push_back(normals[indices[i]].z); |
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} |
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|
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glGenVertexArrays(1, vao); |
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glBindVertexArray(vao[0]); |
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glGenBuffers(numVBOs, vbo); |
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glBindBuffer(GL_ARRAY_BUFFER, vbo[0]); |
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glBufferData(GL_ARRAY_BUFFER, pvalues.size()*sizeof(float), vertices.data(), GL_STATIC_DRAW); |
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|
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glBindBuffer(GL_ARRAY_BUFFER, vbo[1]); |
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glBufferData(GL_ARRAY_BUFFER, tvalues.size()*sizeof(float), tvalues.data(), GL_STATIC_DRAW); |
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|
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glBindBuffer(GL_ARRAY_BUFFER, vbo[2]); |
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glBufferData(GL_ARRAY_BUFFER, nvalues.size()*sizeof(float), nvalues.data(), GL_STATIC_DRAW); |
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} |
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|
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void setupTextures(){
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pyrTex=utils::loadTexture("brick1.jpg"); |
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glBindTexture(GL_TEXTURE_2D,pyrTex); |
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glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_LINEAR); |
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glGenerateMipmap(GL_TEXTURE_2D); |
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); |
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); |
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} |
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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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camera={0.0f,2.0f,-10.0f}; |
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setupVertices(); |
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setupTextures(); |
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} |
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|
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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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glEnable(GL_DEPTH_TEST); |
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glDepthFunc(GL_LEQUAL); |
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glEnableVertexAttribArray(0); |
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glEnableVertexAttribArray(1); |
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|
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mvLoc=glGetUniformLocation(renderingProgram,"mv_matrix"); |
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projLoc=glGetUniformLocation(renderingProgram,"proj_matrix"); |
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|
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glfwGetFramebufferSize(window,&width,&height); |
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aspect=(float)width/(float)height; |
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pMat=glm::perspective(utils::degToRad(60),aspect,0.1f,1000.f); |
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|
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vMat=glm::translate(glm::mat4(1.0f),glm::vec3{camera.x,camera.y,camera.z}); |
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|
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|
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mMat=glm::translate(mMat,{0.f,0.f,0.f}); |
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mvMat=vMat*mMat; |
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|
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glUniformMatrix4fv(mvLoc,1,GL_FALSE,glm::value_ptr(mvMat)); |
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glUniformMatrix4fv(projLoc,1,GL_FALSE,glm::value_ptr(pMat)); |
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glBindBuffer(GL_ARRAY_BUFFER,vbo[0]); |
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glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,0,0); |
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glBindBuffer(GL_ARRAY_BUFFER,vbo[1]); |
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glVertexAttribPointer(0,2,GL_FLOAT,GL_FALSE,0,0); |
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glBindBuffer(GL_ARRAY_BUFFER,vbo[2]); |
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glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,0,0); |
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|
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glActiveTexture(GL_TEXTURE_2D); |
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glBindTexture(GL_TEXTURE_2D,pyrTex); |
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|
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glDrawArrays(GL_TRIANGLES,0,sphere.getNumIndices()); |
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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(1920, 1080, "Texture Mapping!", NULL, NULL); |
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glfwSetWindowPos(window,1400,180); |
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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 +1,94 @@ |
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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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#include <SOIL2/SOIL2.h> |
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|
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#define PI 3.14159 |
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|
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class utils{ |
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inline static std::string readShaderSource(const char *filePath){ |
||||
std::string content; |
||||
std::ifstream fileStream(filePath, std::ios::in); |
||||
std::string line = ""; |
||||
if(fileStream.fail()){ |
||||
std::cout<<"Could not open shader "<<filePath<<"!"<<std::endl; |
||||
throw; |
||||
} |
||||
while (fileStream.good()) { |
||||
getline(fileStream, line); |
||||
content.append(line + "\n"); |
||||
} |
||||
fileStream.close(); |
||||
return content; |
||||
} |
||||
inline static void CompileShader(GLuint shader,std::string type){ |
||||
GLint compiled; |
||||
glCompileShader(shader); |
||||
ErrorCheck::checkOpenGLError(); |
||||
glGetShaderiv(shader,GL_COMPILE_STATUS,&compiled); |
||||
if(compiled!=1){ |
||||
std::cout<<type<<" Compilation Failed!"<<std::endl; |
||||
ErrorCheck::printShaderLog(shader); |
||||
throw; |
||||
} |
||||
} |
||||
inline static void CreateShader(GLuint type,std::string shaderName,const char*source,GLuint vfProgram){ |
||||
if(source!=nullptr){ |
||||
GLuint vShader=glCreateShader(type); |
||||
std::string shaderFile=readShaderSource(source); |
||||
const char*vertShaderSrc=shaderFile.c_str(); |
||||
glShaderSource(vShader,1,&vertShaderSrc,NULL); |
||||
CompileShader(vShader,shaderName); |
||||
glAttachShader(vfProgram,vShader); |
||||
} |
||||
}; |
||||
public: |
||||
inline static GLuint createShaderProgram(const char*vertex,const char*fragment){ |
||||
return createShaderProgram(vertex,nullptr,nullptr,nullptr,fragment); |
||||
} |
||||
inline static GLuint createShaderProgram(const char*vertex,const char*geometry,const char*fragment){ |
||||
return createShaderProgram(vertex,nullptr,nullptr,geometry,fragment); |
||||
} |
||||
inline static GLuint createShaderProgram(const char*vertex,const char*tesselationCS,const char*tesselationES,const char*fragment){ |
||||
return createShaderProgram(vertex,tesselationCS,tesselationES,nullptr,fragment); |
||||
} |
||||
inline static GLuint createShaderProgram(const char*vertex,const char*tesselationCS,const char*tesselationES,const char*geometry,const char*fragment){ |
||||
|
||||
GLuint vfProgram=glCreateProgram(); |
||||
|
||||
CreateShader(GL_VERTEX_SHADER,"Vertex",vertex,vfProgram); |
||||
CreateShader(GL_FRAGMENT_SHADER,"Fragment",fragment,vfProgram); |
||||
CreateShader(GL_TESS_CONTROL_SHADER,"Tesselation Control",tesselationCS,vfProgram); |
||||
CreateShader(GL_TESS_EVALUATION_SHADER,"Tesselation Evaluation",tesselationES,vfProgram); |
||||
CreateShader(GL_GEOMETRY_SHADER,"Geometry",geometry,vfProgram); |
||||
|
||||
GLint linked; |
||||
glLinkProgram(vfProgram); |
||||
ErrorCheck::checkOpenGLError(); |
||||
glGetProgramiv(vfProgram,GL_LINK_STATUS,&linked); |
||||
if(linked!=1){ |
||||
std::cout<<"Linking Failed!"<<std::endl; |
||||
ErrorCheck::printProgramLog(vfProgram); |
||||
} |
||||
return vfProgram; |
||||
} |
||||
inline static float degToRad(float deg){ |
||||
return deg*(PI/180); |
||||
} |
||||
|
||||
inline static float radToDeg(float rad){ |
||||
return rad*57.2957795130823208767; |
||||
} |
||||
|
||||
inline static GLuint loadTexture(const char*file){ |
||||
GLuint textureID; |
||||
textureID=SOIL_load_OGL_texture(file,SOIL_LOAD_AUTO,SOIL_CREATE_NEW_ID,SOIL_FLAG_INVERT_Y); |
||||
if(!textureID){ |
||||
std::cout<<"Could not load texture file "<<file<<std::endl; |
||||
throw; |
||||
} |
||||
return textureID; |
||||
} |
||||
}; |
||||
@ -0,0 +1,67 @@ |
||||
#version 430 |
||||
layout (location=0) in vec3 position; |
||||
layout (location=1) in vec2 texCoords; |
||||
uniform mat4 mv_matrix; |
||||
uniform mat4 proj_matrix; |
||||
out vec4 varyingColor; |
||||
out vec2 uv; |
||||
|
||||
mat4 buildTranslate(float x, float y, float z); |
||||
mat4 buildRotateX(float rad); |
||||
mat4 buildRotateY(float rad); |
||||
mat4 buildRotateZ(float rad); |
||||
|
||||
void main(void) |
||||
{ |
||||
gl_Position=proj_matrix*mv_matrix*vec4(position,1.0); |
||||
uv=texCoords; |
||||
} |
||||
// builds and returns a translation matrix |
||||
mat4 buildTranslate(float x, float y, float z) |
||||
{ |
||||
mat4 trans = mat4(1.0, 0.0, 0.0, 0.0, |
||||
0.0, 1.0, 0.0, 0.0, |
||||
0.0, 0.0, 1.0, 0.0, |
||||
x, y, z, 1.0 ); |
||||
return trans; |
||||
} |
||||
|
||||
// builds and returns a matrix that performs a rotation around the X axis |
||||
mat4 buildRotateX(float rad) |
||||
{ |
||||
mat4 xrot = mat4(1.0, 0.0, 0.0, 0.0, |
||||
0.0, cos(rad), -sin(rad), 0.0, |
||||
0.0, sin(rad), cos(rad), 0.0, |
||||
0.0, 0.0, 0.0, 1.0 ); |
||||
return xrot; |
||||
} |
||||
|
||||
// builds and returns a matrix that performs a rotation around the Y axis |
||||
mat4 buildRotateY(float rad) |
||||
{ |
||||
mat4 yrot = mat4(cos(rad), 0.0, sin(rad), 0.0, |
||||
0.0, 1.0, 0.0, 0.0, |
||||
-sin(rad), 0.0, cos(rad), 0.0, |
||||
0.0, 0.0, 0.0, 1.0 ); |
||||
return yrot; |
||||
} |
||||
|
||||
// builds and returns a matrix that performs a rotation around the Z axis |
||||
mat4 buildRotateZ(float rad) |
||||
{ |
||||
mat4 zrot = mat4(cos(rad), -sin(rad), 0.0, 0.0, |
||||
sin(rad), cos(rad), 0.0, 0.0, |
||||
0.0, 0.0, 1.0, 0.0, |
||||
0.0, 0.0, 0.0, 1.0 ); |
||||
return zrot; |
||||
} |
||||
|
||||
// builds and returns a scale matrix |
||||
mat4 buildScale(float x, float y, float z) |
||||
{ |
||||
mat4 scale = mat4(x, 0.0, 0.0, 0.0, |
||||
0.0, y, 0.0, 0.0, |
||||
0.0, 0.0, z, 0.0, |
||||
0.0, 0.0, 0.0, 1.0 ); |
||||
return scale; |
||||
} |
||||
|
After Width: | Height: | Size: 185 KiB |
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Reference in new issue