// This callback function gets called by the Glut
// system whenever it decides things need to be redrawn.
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glLoadIdentity();
double dt = GetDeltaTime();
if (gFirstPerson)
{
double rad = gRat.getDegrees()/180.0 * M_PI;
double dx = cos(rad) * MOVE_SPEED * dt;
double dy = sin(rad) * MOVE_SPEED * dt;
double hover = 2.0;
double terrainHeight = gMaze.getZ(gRat.getX() + dx, gRat.getY() + dy);
double waterHeight = gWaterHeight + .4;
double H = fmax(terrainHeight, waterHeight) + hover;
double currentTerrainHeight = fmax(waterHeight, gMaze.getZ(gRat.getX(), gRat.getY()));
double tilt = (fmax(terrainHeight, waterHeight) - currentTerrainHeight);
double lookZ = H + tilt;
gluLookAt(gRat.getX(), gRat.getY(), H, gRat.getX() + dx, gRat.getY() + dy, lookZ, 0, 0, 1);
// when doing rat, calculate at point but z will stay.
}
else
{
gluLookAt(M*.5, -N*.5, 15, M*.5, N*.5, 0, 0, 0, 1); // 3 eye, 3 at point, 3 z-axis up
}
gMaze.draw(gWaterHeight);
gRat.draw(gFirstPerson);
if (gLeft) gRat.spinLeft(dt);
if (gRight) gRat.spinRight(dt);
if (gMiddle) gRat.move(dt);
if (gFirstPerson)
{
gluPerspective(.02, (double)screen_x/screen_y, .0001, .0001);
}
else
{
gluPerspective(40, (double)screen_x/screen_y, RES*.5, 3*(RES+RES));
}
glutSwapBuffers();
glutPostRedisplay();
}
// This callback function gets called by the Glut
// system whenever it decides things need to be redrawn.
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glLoadIdentity();
double dt = GetDeltaTime();
if (gFirstPerson)
{
double rad = gRat.getDegrees()/180.0 * M_PI;
double dx = cos(rad) * MOVE_SPEED * dt;
double dy = sin(rad) * MOVE_SPEED * dt;
gluLookAt(gRat.getX(), gRat.getY(), gRatHeight, gRat.getX() + dx, gRat.getY() + dy, gRatHeight, 0, 0, 1);
// when doing rat, calculate at point but z will stay.
}
else
{
gluLookAt(M*.5, -N*.5, 15, M*.5, N*.5, 0, 0, 0, 1); // 3 eye, 3 at point, 3 z-axis up
}
gMaze.draw();
gRat.draw(gFirstPerson);
if (gLeft) gRat.spinLeft(dt);
if (gRight) gRat.spinRight(dt);
if (gMiddle) gRat.move(dt);
if (gFirstPerson)
{
gluPerspective(.02, (double)screen_x/screen_y, .0001, .0001);
}
else
{
gluPerspective(40, (double)screen_x/screen_y, N*.5, 3*(M+N));
}
glutSwapBuffers();
glutPostRedisplay();
}
