A Cessna Skyhawk Skeleton for Further Development in OpenGL (GLUT)

• Download source - 75.83 KB (Visual C++ 6.0 project files)

Introduction

I would hate to see this code go lost. The code in question is a flexible skeleton for a Cessna Skyhawk simulation, but can be developed into a fullfledged flight simulator.

It uses the OpenGL (GLUT) API so if you do not already have GLUT installed on your system, visit http://www.xmission.com/~nate/glut.html to download the latest GLUT binaries.

How to Install glut

• Unpack the contents of the archive glut-3.7.6-bin.zip
• Copy glut.lib to the \Microsoft Visual Studio\VCxx\Lib directory
• Copy glut.h to the \Microsoft Visual Studio\VCxx\Include\GL directory
• Copy glut32.dll to the \WINDOWS\system32 directory

The project files are:

The Controls

The Cessna Skyhawk is controlled by either keyboard or mouse.
The Keyboard controls are:

The key() Function

The key() function is a callback for when the key is pressed and released within the window.

void key(unsigned char k, int xx, int yy)
{
	kbCode=k;
	switch(k)
	{
		case 27:
		  exit(0);
		break;

		case 'c':
			theta[2] += 2.0; // roll right on c
		break;

		case 'z':
			theta[2] -= 2.0; // roll left on z
		break;
		case 's':
			theta[0] += 2.0; // pitch down on s
			updownspeed -= 1;
		break;

		case 'x':
			theta[0] -= 2.0; // pitch up on X
			updownspeed += 1;
		break;

		case 'r':
			reset();
		break;

		case 'q':
			exit(1);
		break;

		case '+':
			if (propvar < 2) propvar = 2; // sets propvar to 2 from 0
			propvar +=10; // adds 10

		break;

		case '-':
			propvar -=10; // decrease speed by 10
			if (propvar < 0){propvar = 0; 	reset();   }
		break;

		case '1':
			floatcamera = 0;
			insidecamera = 0;
			eyex = 0.0;
			eyey = 110.0;
			eyez = -550.0;
			atx = 0.0;
			aty = 0.0;
			atz = 0.0;
			upx = 0.0;
			upy = 1.0;
			upz = 0.0;

		break;

		case '2':
			floatcamera = 0;
			insidecamera = 0;
			eyex = 500.0;
			eyey = 1.0;
			eyez = 0.0;
			atx = 0.0;
			aty = 0.0;
			atz = 0.0;
			upy = 1.0;
			upz = 0.0;

		break;

		case '3':
			floatcamera = 0;
			insidecamera = 0;
			eyex = -500.0;
			eyey = 1.0;
			eyez = 0.0;
			atx = 0.0;
			aty = 0.0;
			atz = 0.0;
			upy = 1.0;
			upz = 0.0;

		break;

		case '4':
			insidecamera = 1;
			eyex = 0.0;
			eyey = 22.0;
			eyez = 35.0;
			atx = 0.0;
			aty = 22.0;
			atz = 100.0;
			upy = 1.0;
			upz = 0.0;

		break;

		case '5':
			floatcamera = 1;
		break;

		case '6':
			floatcamera = 0;
			insidecamera = 0;
			eyex = 0.0;
			eyey = 500.0;
			eyez = -650.0;
			atx = 0.0;
			aty = 0.0;
			atz = 0.0;
			upy = 1.0;
			upz = 0.0;

		break;

		case 'j':
		   eyex -= 10;
		break;
		case 'l':
			eyex += 10;
		break;
		case 'i':
			eyey += 10;
		break;
		case 'k':
			eyey -= 10;
		break;
		case 'u':
			eyez += 10;
		break;

		case 'n':
			atx += 10;
		break;

		case 'm':
			atx -= 10;
		break;


	}//switch

	// checks to see if the plane has exceeded maximum pitch or roll
	if( theta[0] > 360.0 ) theta[0] -= 360.0;
	if( theta[0] < -360.0 ) theta[0] += 360.0;
	if( theta[2] > 360.0 ) theta[2] -= 360.0;
	if( theta[2] < -360.0 ) theta[2] += 360.0;

	glutPostRedisplay();
} 

The mouse controls are:

The motion() Function

The motion() function is a callback for when the mouse moves within the window while no mouse buttons are pressed.

int mouseX, mouseY;		// mouse coordinates
int oldMouseX, oldMouseY;
void motion(int x, int y)
{
	oldMouseX = mouseX;
	oldMouseY = mouseY;
	mouseX = x;
	mouseY = y;

  if (speed>0)
  {
		if ((mouseX - oldMouseX) > 0) theta[2] += 4.0;	// mouse moved 
								// to the right
		else if ((mouseX - oldMouseX) < 0) theta[2] -= 4.0;	// mouse moved 
								// to the left
		if ((mouseY - oldMouseY) < 0)
		{
			theta[0] += 3.0; // pitch down on s
			updownspeed -= 1;

		}
		else if ((mouseY - oldMouseY) > 0) 	// mouse moved to the left
		{
			theta[0] -= 3.0; // pitch up on X
			updownspeed += 1;
		}
     }
} 

This is only a skeleton for a Cessna Skyhawk simulation, but can be developed into a fullfledged flight simulator.