1.制作画布大小 2. 制作台体 3. 台体摆放位罝 4. 台体铺满画布 5.设定台体旋转角度 6.绘制纹理用OpenGL写个代码

好的，以下是一个简单的用OpenGL绘制3D画布和台体的示例代码：

#include <GL/glut.h>

// 定义画布大小
const int WIDTH = 800;
const int HEIGHT = 600;

// 定义台体的顶点坐标
GLfloat vertices[][3] = {
    {-0.5, -0.5, 0.5},
    {0.5, -0.5, 0.5},
    {0.5, 0.5, 0.5},
    {-0.5, 0.5, 0.5},
    {-0.5, -0.5, -0.5},
    {0.5, -0.5, -0.5},
    {0.5, 0.5, -0.5},
    {-0.5, 0.5, -0.5}
};

// 定义台体的面片索引
GLubyte indices[][4] = {
    {0, 1, 2, 3},
    {4, 5, 6, 7},
    {0, 4, 7, 3},
    {1, 5, 6, 2},
    {0, 1, 5, 4},
    {3, 2, 6, 7}
};

// 定义台体的纹理坐标
GLfloat texCoords[][2] = {
    {0.0, 0.0},
    {1.0, 0.0},
    {1.0, 1.0},
    {0.0, 1.0}
};

// 定义画布旋转角度
GLfloat angle = 0.0;

void init() {
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_TEXTURE_2D);
    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    GLuint texture;
    glGenTextures(1, &texture);
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexImage2D(GL_TEXTURE_2D, 0, 3, 256, 256, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
    glPushMatrix();
    glLoadIdentity();
    glTranslatef(0.5, 0.5, 0.0);
    glRotatef(45.0, 0.0, 0.0, 1.0);
    GLubyte texData[256][256][3];
    for (int i = 0; i < 256; i++) {
        for (int j = 0; j < 256; j++) {
            texData[i][j][0] = (i + j) % 256;
            texData[i][j][1] = (i * j) % 256;
            texData[i][j][2] = i % 256;
        }
    }
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 256, 256, GL_RGB, GL_UNSIGNED_BYTE, texData);
    glPopMatrix();
}

void display() {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
    gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
    glRotatef(angle, 0.0, 1.0, 0.0);
    // 绘制台体
    glBegin(GL_QUADS);
    for (int i = 0; i < 6; i++) {
        glTexCoord2fv(texCoords[0]);
        glVertex3fv(vertices[indices[i][0]]);
        glTexCoord2fv(texCoords[1]);
        glVertex3fv(vertices[indices[i][1]]);
        glTexCoord2fv(texCoords[2]);
        glVertex3fv(vertices[indices[i][2]]);
        glTexCoord2fv(texCoords[3]);
        glVertex3fv(vertices[indices[i][3]]);
    }
    glEnd();
    // 绘制画布
    glColor3f(1.0, 1.0, 1.0);
    glBegin(GL_QUADS);
    glVertex3f(-1.0, -1.0, 0.0);
    glVertex3f(1.0, -1.0, 0.0);
    glVertex3f(1.0, 1.0, 0.0);
    glVertex3f(-1.0, 1.0, 0.0);
    glEnd();
    glutSwapBuffers();
}

void reshape(int w, int h) {
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if (w <= h) {
        glOrtho(-2.0, 2.0, -2.0 * (GLfloat) h / (GLfloat) w, 2.0 * (GLfloat) h / (GLfloat) w, -10.0, 10.0);
    } else {
        glOrtho(-2.0 * (GLfloat) w / (GLfloat) h, 2.0 * (GLfloat) w / (GLfloat) h, -2.0, 2.0, -10.0, 10.0);
    }
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}

void spinDisplay() {
    angle += 1.0;
    if (angle > 360.0) {
        angle -= 360.0;
    }
    glutPostRedisplay();
}

int main(int argc, char** argv) {
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
    glutInitWindowSize(WIDTH, HEIGHT);
    glutCreateWindow("3D Canvas");
    glutReshapeFunc(reshape);
    glutDisplayFunc(display);
    glutIdleFunc(spinDisplay);
    init();
    glutMainLoop();
    return 0;
}

这段代码使用OpenGL绘制了一个3D的画布和台体，并将画布和台体铺满整个窗口。您可以根据需要修改代码中的画布大小和台体的大小、纹理等参数。