opengl vert frag glUniform 初始代码参考

最新推荐文章于 2024-11-03 15:07:34 发布

转载最新推荐文章于 2024-11-03 15:07:34 发布 · 411 阅读

本文介绍如何使用OpenGL创建顶点着色器和片段着色器，并从文件中读取着色器代码。此外，还展示了如何为OpenGL程序链接着色器、设置纹理单元以及加载立方体贴图。

char *vs = NULL,*fs = NULL;

vert = glCreateShader(GL_VERTEX_SHADER);
frag = glCreateShader(GL_FRAGMENT_SHADER);

vs = textFileRead(vertFile);
fs = textFileRead(fragFile);
const char * ff = fs;
const char * vv = vs;

glShaderSource(vert, 1, &vv, NULL);
glShaderSource(frag, 1, &ff, NULL);

free(vs); free(fs);

glCompileShader(vert);
glCompileShader(frag);

program = glCreateProgram();
glAttachShader(program, frag);
glAttachShader(program, vert);

glLinkProgram(program);
glUseProgram(program);

LoadCubeTexture(filename, compressedTexture);

GLint location = glGetUniformLocation(program, "tex");
glUniform1i(location, 0);
glActiveTexture(GL_TEXTURE0);

EyePos = glGetUniformLocation(program, "EyePosition");

glUniform4f(EyePos, EyePosition.X(),EyePosition.Y(),
EyePosition.Z(), 1.0);
DWORD bob = glGetError();
//All is fine here
glEnable(GL_DEPTH_TEST);