Mac搭建OpenGL环境

Mac搭建OpenGL环境

1、准备资源

• GLTools
• glew
• libGlTools.a提取码：8ppd

2、搭建OpenGL环境

1. Xcode->macOS->Cocoa App

2. 在link Binary With Libraries中添加OpenGl.framework和GLUT.framework

3. 把资源包中解压后的头文件include和静态库libGLTools.a拖入项目中，注意目录位置。

4. 在Build settings->Header Seatch Paths中设置头文件的路径"$(SRCROOT)/项目名xxx/include"。

5. 删掉Xcode自建的main.m和其余无用的类（AppDelegate.h，AppDelegate.m，ViewController.h和ViewController.m）。

6. 建立main.cpp，注意不要建立头文件。

7. 粘贴以下代码到main中。

#include <GLShaderManager.h>
#include <GLTools.h>
#include <GLUT/GLUT.h>

GLShaderManager shaderManager;
GLBatch triangleBatch;

void changeSize(int w,int h) {
    glViewport(0, 0, w, h);
}

void RenderScene(void) {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);
    GLfloat vRed[] = {1.0,0.0,0.0,1.0f};
    shaderManager.UseStockShader(GLT_SHADER_IDENTITY,vRed);
    triangleBatch.Draw();
    glutSwapBuffers();
}

void setupRC() {
    glClearColor(0.5f, 0.40f, 0.7f, 1);
    shaderManager.InitializeStockShaders();
    GLfloat vVerts[] = {
        -0.5f,0.0f,0.0f,
        0.5f,0.0f,0.0f,
        0.0f,0.5f,0.0f
    };
    triangleBatch.Begin(GL_TRIANGLES, 3);
    triangleBatch.CopyVertexData3f(vVerts);
    triangleBatch.End();
}

int main(int argc,char *argv[]) {
    gltSetWorkingDirectory(argv[0]);
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGBA|GLUT_DEPTH|GLUT_STENCIL);
    glutInitWindowSize(800, 600);
    glutCreateWindow("Triangle");
    glutReshapeFunc(changeSize);
    glutDisplayFunc(RenderScene);
    GLenum status = glewInit();
    if (GLEW_OK != status) {
        printf("GLEW Error:%s\n",glewGetErrorString(status));
        return 1;
    }
    setupRC();
    glutMainLoop();
    return  0;
}
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8. 运行成功后，窗口有可能一片漆黑，拖动窗口调整大小就会从新渲染了。