OpenGL之路（五）制作旋转飞机模型

#include <gl/glut.h>
#include <gl/GLU.h>
#include <gl/GL.h>
#pragma comment(lib, "opengl32.lib")
#pragma comment(lib, "glut32.lib")
#pragma comment(lib, "glu32.lib")
#pragma comment(lib, "glut.lib")
 
#include <math.h>
void Cube() //正方体
{
	glBegin(GL_QUAD_STRIP);//填充凸多边形
	glVertex3f(0.0f, 0.0f, 0.0f);
	glVertex3f(0.0f, 1.0f, 0.0f);
	glVertex3f(1.0f, 0.0f, 0.0f);
	glVertex3f(1.0f, 1.0f, 0.0f);
	glVertex3f(1.0f, 0.0f, -1.0f);
	glVertex3f(1.0f, 1.0f, -1.0f);
	glVertex3f(0.0f, 0.0f, -1.0f);
	glVertex3f(0.0f, 1.0f, -1.0f);
	glVertex3f(0.0f, 0.0f, 0.0f);
	glVertex3f(0.0f, 1.0f, 0.0f);
	glEnd();
	glBegin(GL_QUAD_STRIP);
	glVertex3f(0.0f, 0.0f, 0.0f);
	glVertex3f(1.0f, 0.0f, 0.0f);
	glVertex3f(0.0f, 0.0f, -1.0f);
	glVertex3f(1.0f, 0.0f, -1.0f);
	glVertex3f(0.0f, 1.0f, 0.0f);
	glVertex3f(1.0f, 1.0f, 0.0f);
	glVertex3f(0.0f, 1.0f, -1.0f);
	glVertex3f(1.0f, 1.0f, -1.0f);
	glEnd();
}
void Circle() //圆面
{
	glBegin(GL_TRIANGLE_FAN);//扇形连续填充三角形串
	glVertex3f(0.0f, 0.0f, 0.0f);
	int i = 0;
	for (i = 0; i <= 375; i += 15)
	{
		float p = i * 3.14 / 180;
		glVertex3f(sin(p), cos(p), 0.0f);
	}
	glEnd();
}
 
void Cylinder() //圆柱
{
	glBegin(GL_QUAD_STRIP);//连续填充四边形串
	int i = 0;
	for (i = 0; i <= 375; i += 15)
	{
		float p = i * 3.14 / 180;
		glVertex3f(sin(p), cos(p), 1.0f);
		glVertex3f(sin(p), cos(p), 0.0f);
	}
	glEnd();
	Circle();
	glTranslatef(0, 0, 1);
	Circle();
}
void Cone() //圆锥
{
	glBegin(GL_QUAD_STRIP);//连续填充四边形串
	int i = 0;
	for (i = 0; i <= 390; i += 15)
	{
		float p = i * 3.14 / 180;
		glVertex3f(0, 0, 1.0f);
		glVertex3f(sin(p), cos(p), 0.0f);
	}
	glEnd();
	Circle();
}
 
void AirPlane(float x, float y, float z)
{
	static float i = 0, f = 0;
	i += 0.1;
	f += 0.01;
	if (i > 360)
		i = 0;
	if (f > 360)
		f = 0;
	glPushMatrix();
	glTranslatef(x, y, z);
	glRotatef(f, 1, 1, 1);
 
	glPushMatrix();
	glColor3f(0.5, 1.5, 0.5);
	glRotatef(i, 0, 1, 0);
	glTranslatef(0, 0, 0.5);
	glScalef(0.1, 0.05, 1);
	Cube(); //螺旋桨
	glPopMatrix();
 
	glTranslatef(0, -0.1, 0);
	glScalef(0.1, 0.1, 0.1);
	Cube();
	glScalef(10, 10, 10);
 
	glColor3f(1, 0, 1);
	glTranslatef(0.04, -0.05, -0.9);
	glScalef(0.1, 0.1, 1.5);
	Cylinder();
	glColor3f(0, 1, 0);
	glScalef(1, 1, 0.2);
	Cone();
	glColor3f(0, 1, 1);
	glTranslatef(0, 0.7, -4.5);
	glScalef(0.2, 2, 1);
	Cube();
 
	glTranslatef(-13, 0.3, 0);
	glScalef(27, 0.1, 1);
	Cube();
 
	glPopMatrix();
}
void renderScene(void)
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();
 
	AirPlane(0, 0, -3);
 
	glutSwapBuffers();
}
void changeSize(int w, int h) {
 
	// 防止除数即高度为0
	// (你能够设置窗体宽度为0).
	if (h == 0)
		h = 1;
	float ratio = 1.0* w / h;
 
	// 单位化投影矩阵。
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
 
	// 设置视口大小为整个窗体大小
	glViewport(0, 0, w, h);
 
	// 设置正确的投影矩阵
	gluPerspective(45, ratio, 1, 1000);
	//以下是设置模型视图矩阵
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, -1.0, 0.0f, 1.0f, 0.0f);//设置观測点
}
int main(int argc, char * argv[])
{
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
	glutInitWindowPosition(100, 100);
	glutInitWindowSize(320, 320);
	glutCreateWindow("Hello OpenGL");
	glutDisplayFunc(renderScene);
	glutIdleFunc(renderScene); //指定程序空暇时调用函数
	glutReshapeFunc(changeSize); //指定窗体形状变化时的回调函数
	glEnable(GL_DEPTH_TEST);
	glutMainLoop();
	return 0;
}

预览图