OpenGL实验（二三代码整理）桌子

终于把桌子都搞定了（虽然还是有点丑？）算是把一开始想做的都做了吧

table.h

//@author Birdy&C 2017.4.7
#pragma once
#define GLUT_DISABLE_ATEXIT_HACK
#include <stdio.h>
#include<windows.h>
#include <gL\GLAUX.H>
#include <gl\GLUT.H>  //函数声明//===========main.cpp============//void init();//===========event.cpp============//
void timer(int p);
void mouse(int button, int state, int x, int y);
void motion(int x, int y);
void special(int key, int x, int y);
void keyboard(unsigned char key, int x, int y);
void setProjection(int width, int height);
void reshape(int w1, int h1);//===========render.cpp============//
AUX_RGBImageRec *LoadBMP(CHAR *Filename);
int LoadGLTextures();
void Draw_Leg();
void Draw_Table();
void drawMain();
void renderScene();
void renderScenesw1();
void renderScenesw2();
void renderScenesw3();
void renderSceneAll();//全局变量extern bool mouseisdown, loopr;
extern int mainWindow, subWindow1, subWindow2, subWindow3, rx, ry, rz, tx, ty, w, h;
extern int time, state;
extern const int border;
extern float  mx, mz;
extern GLuint  texture[1];

render.cpp

// render.cpp : 绘制函数
//@author Birdy&C 2017.4.7#include "table.h"AUX_RGBImageRec *LoadBMP(CHAR *Filename)    // 载入位图图象
{FILE *File = NULL;                      // 文件句柄int check;if (!Filename)                          // 确保文件名已提供{return NULL;                        // 如果没提供，返回 NULL}check = fopen_s(&File, Filename, "r");      // 尝试打开文件if (check == 0)                             // 文件存在{fclose(File);                           // 关闭句柄return auxDIBImageLoadA(Filename);      // 载入位图并返回指针}return NULL;                                // 如果载入失败，返回 NULL
}int LoadGLTextures()         // 载入位图(调用上面的代码)并转换成纹理
{int Status = FALSE;                             // 状态指示器AUX_RGBImageRec *TextureImage[1];               // 创建纹理的存储空间memset(TextureImage, 0, sizeof(void *) * 1);    // 将指针设为 NULLTextureImage[0] = LoadBMP("wood.bmp");          // 载入位图，检查有无错误，如果位图没找到则退出if (NULL != TextureImage[0]){Status = TRUE;                              // 将 Status 设为 TRUEprintf("LOAD SUCCESS\n");glGenTextures(1, &texture[0]);              // 创建纹理glBindTexture(GL_TEXTURE_2D, texture[0]);   // 使用来自位图数据生成 的典型纹理// 生成纹理glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage[0]->sizeX, TextureImage[0]->sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE, TextureImage[0]->data);glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); // 线形滤波glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // 线形滤波}if (TextureImage[0])                    // 纹理是否存在{if (TextureImage[0]->data)          // 纹理图像是否存在{free(TextureImage[0]->data);    // 释放纹理图像占用的内存}free(TextureImage[0]);              // 释放图像结构}return Status;                          // 返回 Status
}void Draw_Leg() // This function draws a triangle with RGB colors
{//四面glBegin(GL_QUADS);glTexCoord2f(0.0f, 1.0f);   glVertex3f(-0.5f, 0.5f, 0.0f); // 纹理和四边形的左上glTexCoord2f(0.0f, 0.0f);   glVertex3f(-0.5f, 0.5f, 3.0f); // 纹理和四边形的左下glTexCoord2f(1.0f, 0.0f);   glVertex3f(0.5f, 0.5f, 3.0f); // 纹理和四边形的右下glTexCoord2f(1.0f, 1.0f);   glVertex3f(0.5f, 0.5f, 0.0f); // 纹理和四边形的右上glTexCoord2f(1.0f, 1.0f);   glVertex3f(-0.5f, -0.5f, 0.0f); // 纹理和四边形的右上glTexCoord2f(0.0f, 1.0f);   glVertex3f(0.5f, -0.5f, 0.0f); // 纹理和四边形的左上glTexCoord2f(0.0f, 0.0f);   glVertex3f(0.5f, -0.5f, 3.0f); // 纹理和四边形的左下glTexCoord2f(1.0f, 0.0f);   glVertex3f(-0.5f, -0.5f, 3.0f); // 纹理和四边形的右下glTexCoord2f(1.0f, 0.0f);   glVertex3f(0.5f, -0.5f, 0.0f); // 纹理和四边形的右下glTexCoord2f(1.0f, 1.0f);   glVertex3f(0.5f, 0.5f, 0.0f); // 纹理和四边形的右上glTexCoord2f(0.0f, 1.0f);   glVertex3f(0.5f, 0.5f, 3.0f); // 纹理和四边形的左上glTexCoord2f(0.0f, 0.0f);   glVertex3f(0.5f, -0.5f, 3.0f); // 纹理和四边形的左下glTexCoord2f(0.0f, 0.0f);   glVertex3f(-0.5f, 0.5f, 0.0f); // 纹理和四边形的左下glTexCoord2f(1.0f, 0.0f);   glVertex3f(-0.5f, -0.5f, 0.0f); // 纹理和四边形的右下glTexCoord2f(1.0f, 1.0f);   glVertex3f(-0.5f, -0.5f, 3.0f); // 纹理和四边形的右上glTexCoord2f(0.0f, 1.0f);   glVertex3f(-0.5f, 0.5f, 3.0f); // 纹理和四边形的左上//底边glTexCoord2f(0.4f, 0.0f); glVertex3f(-0.5f, -0.5f, 0); // 纹理和四边形的右下glTexCoord2f(0.4f, 0.4f); glVertex3f(-0.5f, 0.5f, 0); // 纹理和四边形的右上glTexCoord2f(0.0f, 0.4f); glVertex3f(0.5f, 0.5f, 0); // 纹理和四边形的左上glTexCoord2f(0.0f, 0.4f); glVertex3f(0.5f, -0.5f, 0); // 纹理和四边形的左下glEnd();
}void Draw_Table() // This function draws a triangle with RGB colors
{//glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);            //空心//glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);        //实心glBindTexture(GL_TEXTURE_2D, texture[0]);      // 选择纹理//glColor3f(1.0f, 1.0f, 1.0f);                      //选择颜色//上下glBegin(GL_QUADS);glTexCoord2f(0.0f, 0.0f);   glVertex3f(-2.5f, 2.0f, 4.0f);// 纹理和四边形的左上glTexCoord2f(1.0f, 0.0f);   glVertex3f(2.5f, 2.0f, 4.0f);// 纹理和四边形的右上glTexCoord2f(1.0f, 1.0f);   glVertex3f(2.5f, -2.0f, 4.0f); // 纹理和四边形的右下glTexCoord2f(0.0f, 1.0f);   glVertex3f(-2.5f, -2.0f, 4.0f);// 纹理和四边形的左下glTexCoord2f(1.0f, 0.0f);   glVertex3f(-2.5f, -2.0f, 3.0f); // 纹理和四边形的右下glTexCoord2f(1.0f, 1.0f);   glVertex3f(-2.5f, 2.0f, 3.0f);// 纹理和四边形的右上glTexCoord2f(0.0f, 1.0f);   glVertex3f(2.5f, 2.0f, 3.0f); // 纹理和四边形的左上glTexCoord2f(0.0f, 0.0f);   glVertex3f(2.5f, -2.0f, 3.0f); // 纹理和四边形的左下     //四面glTexCoord2f(0.5f, 0.0f);   glVertex3f(2.5f, -2.0f, 4.0f); // 纹理和四边形的左下glTexCoord2f(0.5f, 1.0f);   glVertex3f(2.5f, 2.0f, 3.0f); // 纹理和四边形的右下glTexCoord2f(0.0f, 1.0f);   glVertex3f(2.5f, -2.0f, 3.0f); // 纹理和四边形的右上glTexCoord2f(0.0f, 0.0f);   glVertex3f(2.5f, 2.0f, 4.0f); // 纹理和四边形的左上glTexCoord2f(0.5f, 0.0f);   glVertex3f(-2.5f, 2.0f, 3.0f); // 纹理和四边形的左上glTexCoord2f(1.0f, 0.0f);   glVertex3f(-2.5f, -2.0f, 3.0f);// 纹理和四边形的左下glTexCoord2f(1.0f, 1.0f);   glVertex3f(-2.5f, -2.0f, 4.0f); // 纹理和四边形的右下glTexCoord2f(0.5f, 1.0f);   glVertex3f(-2.5f, 2.0f, 4.0f); // 纹理和四边形的右上glTexCoord2f(0.0f, 1.0f);   glVertex3f(-2.5f, 2.0f, 3.0f); // 纹理和四边形的左上glTexCoord2f(0.0f, 0.5f);   glVertex3f(-2.5f, 2.0f, 4.0f); // 纹理和四边形的左下glTexCoord2f(1.0f, 0.5f);   glVertex3f(2.5f, 2.0f, 4.0f); // 纹理和四边形的右下glTexCoord2f(1.0f, 1.0f);   glVertex3f(2.5f, 2.0f, 3.0f); // 纹理和四边形的右上glTexCoord2f(1.0f, 0.5f);   glVertex3f(-2.5f, -2.0f, 3.0f);// 纹理和四边形的右上glTexCoord2f(0.0f, 0.5f);   glVertex3f(2.5f, -2.0f, 3.0f); // 纹理和四边形的左上glTexCoord2f(0.0f, 0.0f);   glVertex3f(2.5f, -2.0f, 4.0f); // 纹理和四边形的左下glTexCoord2f(1.0f, 0.0f);   glVertex3f(-2.5f, -2.0f, 4.0f); // 纹理和四边形的右下glEnd();//画桌子腿glPushMatrix();glTranslatef(1.5f, 1.0f, 0.0f);Draw_Leg();glPopMatrix();glPushMatrix();glTranslatef(1.5f, -1.0f, 0.0f);Draw_Leg();glPopMatrix();glPushMatrix();glTranslatef(-1.5f, 1.0f, 0.0f);Draw_Leg();glPopMatrix();glPushMatrix();glTranslatef(-1.5f, -1.0f, 0.0f);Draw_Leg();glPopMatrix();glFlush();}void drawMain()
{glPushMatrix();if (loopr){switch (state){case 1:mz = 0.1 * time;state = 1;break;case 2:rx = 12 * time;break;case 3:glScalef(1 + 0.01*time, 1 + 0.01*time, 1 + 0.01*time);break;}}glTranslatef(mx, 0.0f, mz);     // 平移//旋转glRotatef(rx, 1, 0, 0); glRotatef(ry, 0, 1, 0);glRotatef(rz, 0, 0, 1);glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // 清除屏幕和深度缓存Draw_Table();                       // Draw table   glPopMatrix();}// Display func for main window
void renderScene() {glClearColor(1.0, 1.0, 1.0, 0.0);glutSwapBuffers();glutSetWindow(mainWindow);glClear(GL_COLOR_BUFFER_BIT);glutPostRedisplay();
}// Display func for sub window 1
void renderScenesw1() {glutSetWindow(subWindow1);glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glLoadIdentity();gluLookAt(0, 15.0f, 0, 0, 0, 0, 0.0f, 0.0f, 1.0f);glPushMatrix();drawMain();glPopMatrix();glutSwapBuffers();glutPostRedisplay();}// Display func for sub window 2
void renderScenesw2() {glutSetWindow(subWindow2);glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glLoadIdentity();gluLookAt(15.0f, 0, 0, 0, 0, 0, 0.0f, 0.0f, 1.0f);glPushMatrix();drawMain();glPopMatrix();glutSwapBuffers();glutPostRedisplay();
}// Display func for sub window 3
void renderScenesw3() {glutSetWindow(subWindow3);glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glLoadIdentity();gluLookAt(0, 0, 15.0f, 0, 0, 0, 0, -1, 0);glPushMatrix();drawMain();glPopMatrix();glutSwapBuffers();glutPostRedisplay();}// Global render func
void renderSceneAll()
{renderScene();renderScenesw1();renderScenesw2();renderScenesw3();
}

event.cpp

// event.cpp : 处理事件
//@author Birdy&C 2017.4.7
#include "table.h"void timer(int p)
{time++;if (time >= 30)  time = 0;if (loopr){glutTimerFunc(200, timer, 0);//循环}
}void mouse(int button, int state, int x, int y)
{if (button == GLUT_LEFT_BUTTON){if (state == GLUT_DOWN){mouseisdown = true; loopr = false;tx = x;ty = y;}else{mouseisdown = false;}}if (button == GLUT_RIGHT_BUTTON)if (state == GLUT_DOWN){loopr = true;glutTimerFunc(200, timer, 0);}
}void motion(int x, int y)
{if (mouseisdown == true)        //如果是鼠标左键按下拖动{rz += x - tx;                   //偏移量记录rx += y - ty;               tx = x;                         //更新坐标ty = y;glutPostRedisplay();}
}void special(int key, int x, int y)
{//上下左右键盘控制xz坐标方向上的平移switch (key){case GLUT_KEY_LEFT:mx += 0.2;glutPostRedisplay();break;case GLUT_KEY_RIGHT:mx -= 0.2;glutPostRedisplay();break;case GLUT_KEY_UP:mz += 0.2;glutPostRedisplay();break;case GLUT_KEY_DOWN:mz -= 0.2;glutPostRedisplay();break;}
}void keyboard(unsigned char key, int x, int y)
{//123改变自动移动方式//接收事件的时候改变坐标位置（使得满足作业要求）switch (key){case '1':rx = ry = rz = 0;mx = mz = 0;mx = 5;state = 1;break;case '2':rx = ry = rz = 0;mx = mz = 0;state = 2;break;case '3':rx = ry = rz = 0;mx = mz = 0;mx = -5;state = 3;break;}
}void setProjection(int width, int height)
{glViewport(0, 0, width, height);                        // Reset The Current ViewportglMatrixMode(GL_PROJECTION);                            // Select The Projection MatrixglLoadIdentity();                                       // Reset The Projection Matrix// Calculate The Aspect Ratio Of The WindowgluPerspective(45.0f, (GLfloat)width / (GLfloat)height, 0.1f, 100.0f);glMatrixMode(GL_MODELVIEW);                             // Select The Modelview MatrixglLoadIdentity();                                       // Reset The Modelview Matrix
}void reshape(int w1, int h1) {if (h1 == 0)h1 = 1;// we're keeping these values cause we'll need them latterw = w1;h = h1;// set subwindow 1 as the active windowglutSetWindow(subWindow1);// resize and reposition the sub windowglutPositionWindow(border, border);glutReshapeWindow(w - 2 * border, h / 2 - border * 3 / 2);setProjection(w - 2 * border, h / 2 - border * 3 / 2);// set subwindow 2 as the active windowglutSetWindow(subWindow2);// resize and reposition the sub windowglutPositionWindow(border, (h + border) / 2);glutReshapeWindow(w / 2 - border * 3 / 2, h / 2 - border * 3 / 2);setProjection(w / 2 - border * 3 / 2, h / 2 - border * 3 / 2);// set subwindow 3 as the active windowglutSetWindow(subWindow3);// resize and reposition the sub windowglutPositionWindow((w + border) / 2, (h + border) / 2);glutReshapeWindow(w / 2 - border * 3 / 2, h / 2 - border * 3 / 2);setProjection(w / 2 - border * 3 / 2, h / 2 - border * 3 / 2);
}

main.cpp

// main.cpp : 定义控制台应用程序的入口点。
//@author Birdy&C 2017.4.7#include "table.h"//子窗口
int mainWindow, subWindow1, subWindow2, subWindow3;
//旋转记录
int rx = 0;
int ry = 0;
int rz = 0;
//平移记录
float mx = 0;
float mz = 0;
//鼠标位置
int tx, ty;
//边界宽度
const int border = 6;
//主窗口大小
int w, h;
//自动事件控制
bool mouseisdown = false;
bool loopr = false;
int state = 1;
int time = 0;
//存储纹理
GLuint  texture[1]; //初始化
void init()
{//纹理控制部分//glCullFace(GL_BACK);              //背面裁剪(背面不可见)//glEnable(GL_CULL_FACE);           //启用裁剪glEnable(GL_DEPTH_TEST);            //深度测试glEnable(GL_TEXTURE_2D);LoadGLTextures();                   //载入纹理贴图//事件处理部分glutIgnoreKeyRepeat(0);             //确认是否忽略自动的连续击键glutMouseFunc(mouse);               //鼠标点击事件glutMotionFunc(motion);             //鼠标拖动事件glutKeyboardFunc(keyboard);         //键盘事件glutSpecialFunc(special);           //特殊键盘 没有ASCII值 如上下左右//光照控制部分GLfloat DiffuseLightn[] = { 1.0, 1.0, 1.0, 0.0 };GLfloat light_position1[] = { 10.0, 20.0, 30.0, 0.0 };GLfloat light_position2[] = { 10.0, 10.0, -30.0, 0.0 };glLightfv(GL_LIGHT0,  GL_DIFFUSE, DiffuseLightn);glLightfv(GL_LIGHT0, GL_POSITION, light_position1);glLightfv(GL_LIGHT1, GL_DIFFUSE, DiffuseLightn);glLightfv(GL_LIGHT1, GL_POSITION, light_position2);glEnable(GL_LIGHTING);glEnable(GL_LIGHT0);glEnable(GL_LIGHT1);glDepthFunc(GL_LESS);}int main (int argc,  char *argv[])
{glutInit(&argc, argv);glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA);glutInitWindowSize(640,480);mainWindow = glutCreateWindow("Birdy");LoadGLTextures();            //载入纹理贴图glutDisplayFunc(renderSceneAll);glutReshapeFunc(reshape);init();//子窗口建立subWindow1 = glutCreateSubWindow(mainWindow, border, border, w - 2 * border, h / 2 - border * 3 / 2);glutDisplayFunc(renderScenesw1);init();subWindow2 = glutCreateSubWindow(mainWindow, border, (h + border) / 2, w / 2 - border * 3 / 2, h / 2 - border * 3 / 2);glutDisplayFunc(renderScenesw2);init();subWindow3 = glutCreateSubWindow(mainWindow, (w + border) / 2, (h + border) / 2, w / 2 - border * 3 / 2, h / 2 - border * 3 / 2);glutDisplayFunc(renderScenesw3);init();glutMainLoop();return 0;
}

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