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| 1 | #include <iostream> | |
| 2 | ||
| 3 | #include <GL/glew.h> | |
| 4 | #include <GL/glfw.h> | |
| 5 | ||
| 6 | #include "LoadShaders.h" | |
| 7 | ||
| 8 | GLuint vertexArrayObjects[1]; | |
| 9 | GLuint buffers[1]; | |
| 10 | const GLuint vertexCount = 6; | |
| 11 | ||
| 12 | void init() {
| |
| 13 | // glClearColor(0,0,0,0); | |
| 14 | ||
| 15 | glGenVertexArrays(1, vertexArrayObjects); | |
| 16 | glBindVertexArray(vertexArrayObjects[0]); | |
| 17 | ||
| 18 | GLfloat vertices[vertexCount][2] {
| |
| 19 | {-90.0, -90.0},
| |
| 20 | { 85.0, -90.0},
| |
| 21 | {-90.0, 85.0},
| |
| 22 | { 90.0, -85.0},
| |
| 23 | { 90.0, 90.0},
| |
| 24 | {-85.0, 90.0}
| |
| 25 | }; | |
| 26 | ||
| 27 | glGenBuffers(1, buffers); | |
| 28 | glBindBuffer(GL_ARRAY_BUFFER, buffers[0]); | |
| 29 | glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW); | |
| 30 | ||
| 31 | ShaderInfo shaders[] {
| |
| 32 | {GL_VERTEX_SHADER, "one.vsh"},
| |
| 33 | {GL_FRAGMENT_SHADER, "one.fsh"},
| |
| 34 | {GL_NONE, nullptr}
| |
| 35 | }; | |
| 36 | ||
| 37 | GLuint program = LoadShaders(shaders); | |
| 38 | glUseProgram(program); | |
| 39 | ||
| 40 | - | glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, ((char *)NULL + (1))); |
| 40 | + | glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, ((char *)NULL + (0))); |
| 41 | glEnableVertexAttribArray(0); | |
| 42 | ||
| 43 | ||
| 44 | } | |
| 45 | ||
| 46 | void display() {
| |
| 47 | glClear(GL_COLOR_BUFFER_BIT); | |
| 48 | ||
| 49 | glBindVertexArray(vertexArrayObjects[0]); | |
| 50 | glDrawArrays(GL_TRIANGLES, 0, vertexCount); | |
| 51 | ||
| 52 | glFlush(); | |
| 53 | } | |
| 54 | ||
| 55 | int main(int argc, char * argv[]) | |
| 56 | {
| |
| 57 | if(!glfwInit()) {
| |
| 58 | glfwTerminate(); | |
| 59 | std::cerr << "unable to initialize GLFW" << std::endl; | |
| 60 | return EXIT_FAILURE; | |
| 61 | } | |
| 62 | ||
| 63 | glfwOpenWindowHint(GLFW_WINDOW_NO_RESIZE, GL_TRUE); | |
| 64 | glfwOpenWindowHint(GLFW_FSAA_SAMPLES, 0); | |
| 65 | glfwOpenWindowHint(GLFW_OPENGL_VERSION_MAJOR, 3); | |
| 66 | glfwOpenWindowHint(GLFW_OPENGL_VERSION_MINOR, 2); | |
| 67 | glfwOpenWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); | |
| 68 | glfwOpenWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); | |
| 69 | ||
| 70 | if(!glfwOpenWindow(512,512, | |
| 71 | 8,8,8, | |
| 72 | 8,24,8, | |
| 73 | GLFW_WINDOW)) {
| |
| 74 | glfwTerminate(); | |
| 75 | std::cerr << "unable to create window" << std::endl; | |
| 76 | return EXIT_FAILURE; | |
| 77 | } | |
| 78 | glfwSetWindowTitle("OpenGL Application");
| |
| 79 | ||
| 80 | glewExperimental = true; | |
| 81 | if(glewInit()) {
| |
| 82 | glfwTerminate(); | |
| 83 | std::cerr << "unable to initialize GLEW" << std::endl; | |
| 84 | return EXIT_FAILURE; | |
| 85 | } | |
| 86 | ||
| 87 | init(); | |
| 88 | ||
| 89 | while (glfwGetWindowParam(GLFW_OPENED)) {
| |
| 90 | display(); | |
| 91 | glfwSwapBuffers(); | |
| 92 | } | |
| 93 | ||
| 94 | ||
| 95 | glfwTerminate(); | |
| 96 | return EXIT_SUCCESS; | |
| 97 | } |
