void myInit()
{
glActiveTexture(GL_TEXTURE0);
//make the background look like the sky
float blue[4] = {0.5,0.5,1.0,0.0};
glClearColor(0.5, 0.5, 1.0, 0.0);
glShadeModel(GL_SMOOTH);
glEnable(GL_FOG);
glFogfv(GL_FOG_COLOR,blue);
glFogf(GL_FOG_MODE, GL_EXP2);
glFogf(GL_FOG_START, 200);
glFogf(GL_FOG_END, 1000);
glFogf(GL_FOG_DENSITY, gFogDensity);
//initial terrain
myTerrain.initializeTerrain("../Data/Texture/Terrain/sand.tga", "../Data/Texture/Terrain/cactus.tga");
//initial ground collision square
groundCollSquare.setParameters(TVector(0.0, 1.0, 0.0), gCenterPoint);
//initial tank
tankHeightPos = myTerrain.GetHeight(gCenterPoint.X()+100.0, gCenterPoint.Z());
myTank.setParameters("T-90.3DS", "../T-90/",TVector(gCenterPoint.X()-600.0, tankHeightPos + 9.0, gCenterPoint.Z()-20), 0.0, &myTerrain, &collisionBoxArray, &wall);
myTank.initTank();
unsigned int brickTexture;
createTexture("../Data/Texture/Brick/brick.bmp", brickTexture);
wall.Init(myTank.getPosition().X() + 50, myTank.getPosition().Y()-8, myTank.getPosition().Z() + 20, NUM_BRICKS, brickTexture, &myTerrain);
}
void caculateCameraView(unsigned int viewMode)
{
switch(viewMode)
{
case 0:
gRadViewAngle = M_PI*angleWithX/180.0 - M_PI;
gCameraPosition.setX(myTank.getPosition().X() + 150*cos(gRadViewAngle));
gCameraPosition.setY(myTank.getPosition().Y() + 30);
gCameraPosition.setZ(myTank.getPosition().Z() - 150*sin(gRadViewAngle));
camera.changePosition(gCameraPosition);
camera.changeTarget(gCameraPosition.X() - 150.0*cos(gRadViewAngle), gCameraPosition.Y(), gCameraPosition.Z() + 150.0*sin(gRadViewAngle));
break;
case 1:
gRadViewAngle = M_PI*myTank.getAngleWithX()/180.0 - M_PI;
gCameraPosition.setX(myTank.getPosition().X() + 250*cos(gRadViewAngle));
gCameraPosition.setY(myTank.getPosition().Y() + 50.0);
gCameraPosition.setZ(myTank.getPosition().Z() - 250*sin(gRadViewAngle));
camera.changePosition(gCameraPosition);
camera.changeTarget(gCameraPosition.X() - 150.0*cos(gRadViewAngle), gCameraPosition.Y(), gCameraPosition.Z() + 150.0*sin(gRadViewAngle));
break;
case 2:
gRadViewAngle = M_PI*myTank.getAngleWithX()/180.0 - M_PI*0.5;
gCameraPosition.setX(myTank.getPosition().X() + 250*cos(gRadViewAngle));
gCameraPosition.setY(myTank.getPosition().Y() + 50.0);
gCameraPosition.setZ(myTank.getPosition().Z() - 250*sin(gRadViewAngle));
camera.changePosition(gCameraPosition);
camera.changeTarget(gCameraPosition.X() - 150.0*cos(gRadViewAngle), gCameraPosition.Y(), gCameraPosition.Z() + 150.0*sin(gRadViewAngle));
break;
case 3:
gRadViewAngle = M_PI*myTank.getAngleWithX()/180.0;
gCameraPosition.setX(myTank.getPosition().X() + 250*cos(gRadViewAngle));
gCameraPosition.setY(myTank.getPosition().Y() + 50.0);
gCameraPosition.setZ(myTank.getPosition().Z() - 250*sin(gRadViewAngle));
camera.changePosition(gCameraPosition);
camera.changeTarget(gCameraPosition.X() - 150.0*cos(gRadViewAngle), gCameraPosition.Y(), gCameraPosition.Z() + 150.0*sin(gRadViewAngle));
break;
}
}