// Ambient.c
// OpenGL SuperBible
// Beginning of OpenGL lighting sample
// Demonstrates Ambient Lighting
// Program by Richard S. Wright Jr.
/* OpenGL 超级宝典例子， 翻译*/
#include "../../Common/OpenGLSB.h" // System and OpenGL Stuff
// 旋转次数
static GLfloat xRot = 0.0f;
static GLfloat yRot = 0.0f;
// 画场景回调函数
void RenderScene(void)
{
// 清除颜色及深度缓冲区
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//保存矩阵状态
glPushMatrix();
//沿x=1旋转xRot角度
glRotatef(xRot, 1.0f, 0.0f, 0.0f);
//沿y=1旋转yRot角度
glRotatef(yRot, 0.0f, 1.0f, 0.0f);
// 飞机
// 绿色
glColor3ub(0, 255, 0);
//画三角形
glBegin(GL_TRIANGLES);
//机头-绿色
//机头下巴
glVertex3f(0.0f, 0.0f, 60.0f);
glVertex3f(-15.0f, 0.0f, 30.0f);
glVertex3f(15.0f,0.0f,30.0f);
//机头左脸
glVertex3f(15.0f,0.0f,30.0f);
glVertex3f(0.0f, 15.0f, 30.0f);
glVertex3f(0.0f, 0.0f, 60.0f);
//机头右脸
glVertex3f(0.0f, 0.0f, 60.0f);
glVertex3f(0.0f, 15.0f, 30.0f);
glVertex3f(-15.0f,0.0f,30.0f);
//机身--银色
glColor3ub(192,192,192);
//左侧机身
glVertex3f(-15.0f,0.0f,30.0f);
glVertex3f(0.0f, 15.0f, 30.0f);
glVertex3f(0.0f, 0.0f, -56.0f);
//右侧机身
glVertex3f(0.0f, 0.0f, -56.0f);
glVertex3f(0.0f, 15.0f, 30.0f);
glVertex3f(15.0f,0.0f,30.0f);
//机身腹部
glVertex3f(15.0f,0.0f,30.0f);
glVertex3f(-15.0f, 0.0f, 30.0f);
glVertex3f(0.0f, 0.0f, -56.0f);
// 左机翼
// 深灰
glColor3ub(64,64,64);
//翼展
glVertex3f(0.0f,2.0f,27.0f);
glVertex3f(-60.0f, 2.0f, -8.0f);
glVertex3f(60.0f, 2.0f, -8.0f);
//右机翼
glVertex3f(60.0f, 2.0f, -8.0f);
glVertex3f(0.0f, 7.0f, -8.0f);
glVertex3f(0.0f,2.0f,27.0f);
//左机翼
glVertex3f(60.0f, 2.0f, -8.0f);
glVertex3f(-60.0f, 2.0f, -8.0f);
glVertex3f(0.0f,7.0f,-8.0f);
glVertex3f(0.0f,2.0f,27.0f);
glVertex3f(0.0f, 7.0f, -8.0f);
glVertex3f(-60.0f, 2.0f, -8.0f);
// 机尾
//背鳍
glColor3ub(255,255,0);
glVertex3f(-30.0f, -0.50f, -57.0f);
glVertex3f(30.0f, -0.50f, -57.0f);
glVertex3f(0.0f,-0.50f,-40.0f);
glVertex3f(0.0f,-0.5f,-40.0f);
glVertex3f(30.0f, -0.5f, -57.0f);
glVertex3f(0.0f, 4.0f, -57.0f);
glVertex3f(0.0f, 4.0f, -57.0f);
glVertex3f(-30.0f, -0.5f, -57.0f);
glVertex3f(0.0f,-0.5f,-40.0f);
glVertex3f(30.0f,-0.5f,-57.0f);
glVertex3f(-30.0f, -0.5f, -57.0f);
glVertex3f(0.0f, 4.0f, -57.0f);
//红色机尾
glColor3ub(255,0,0);
glVertex3f(0.0f,0.5f,-40.0f);
glVertex3f(3.0f, 0.5f, -57.0f);
glVertex3f(0.0f, 25.0f, -65.0f);
glVertex3f(0.0f, 25.0f, -65.0f);
glVertex3f(-3.0f, 0.5f, -57.0f);
glVertex3f(0.0f,0.5f,-40.0f);
glVertex3f(3.0f,0.5f,-57.0f);
glVertex3f(-3.0f, 0.5f, -57.0f);
glVertex3f(0.0f, 25.0f, -65.0f);
glEnd();
glPopMatrix();
//显示结果
glutSwapBuffers();
}
//初始化
void SetupRC()
{
//白色光强度
GLfloat ambientLight[] = { 1.0f, 1.0f, 1.0f, 1.0f };
glEnable(GL_DEPTH_TEST); //深度测试，背面消隐
glEnable(GL_CULL_FACE); //三角形里面不参与计算
glFrontFace(GL_CCW); //逆时针为正面
//启动光照
glEnable(GL_LIGHTING);
//设置光照模型为环境光
glLightModelfv(GL_LIGHT_MODEL_AMBIENT,ambientLight);
glEnable(GL_COLOR_MATERIAL); // 启动材料颜色跟踪
//材料正面满反射
glColorMaterial(GL_FRONT,GL_AMBIENT_AND_DIFFUSE);
//背景颜色
glClearColor(0.0f, 0.0f, 05.f,1.0f);
}
void SpecialKeys(int key, int x, int y)
{
if(key == GLUT_KEY_UP)
xRot-= 5.0f;
if(key == GLUT_KEY_DOWN)
xRot += 5.0f;
if(key == GLUT_KEY_LEFT)
yRot -= 5.0f;
if(key == GLUT_KEY_RIGHT)
yRot += 5.0f;
if(key > 356.0f)
xRot = 0.0f;
if(key < -1.0f)
xRot = 355.0f;
if(key > 356.0f)
yRot = 0.0f;
if(key < -1.0f)
yRot = 355.0f;
glutPostRedisplay();
}
void ChangeSize(int w, int h)
{
GLfloat nRange = 80.0f;
if(h == 0)
h = 1;
glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if (w <= h)
glOrtho (-nRange, nRange, -nRange*h/w, nRange*h/w, -nRange, nRange);
else
glOrtho (-nRange*w/h, nRange*w/h, -nRange, nRange, -nRange, nRange);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
int main(int argc, char* argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(800,600);
glutCreateWindow("Ambient Light Jet");
glutReshapeFunc(ChangeSize);
glutSpecialFunc(SpecialKeys);
glutDisplayFunc(RenderScene);
SetupRC();
glutMainLoop();
return 0;
}
