void OpenGLRenderer::setupCameraPerspective(float pitch, float heading, float fov) {
// TODO: Find a correct and exact formula for the FOV
GLfloat glFOV = 0.63 * fov; // Approximative and experimental formula
if (fov > 79.0 && fov < 81.0)
glFOV = 50.5; // Somewhat good value for fov == 80
else if (fov > 59.0 && fov < 61.0)
glFOV = 36.0; // Somewhat good value for fov == 60
Common::Rect frame = frameViewport();
glViewport(frame.left, frame.top, frame.width(), frame.height());
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
Math::Matrix4 m = Math::makePerspectiveMatrix(glFOV, (GLfloat)kOriginalWidth / (GLfloat)kFrameHeight, 1.0, 10000.0);
glMultMatrixf(m.getData());
// Rotate the model to simulate the rotation of the camera
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRotatef(pitch, -1.0f, 0.0f, 0.0f);
glRotatef(heading - 180.0f, 0.0f, 1.0f, 0.0f);
glGetDoublev(GL_MODELVIEW_MATRIX, _cubeModelViewMatrix);
glGetDoublev(GL_PROJECTION_MATRIX, _cubeProjectionMatrix);
glGetIntegerv(GL_VIEWPORT, (GLint *)_cubeViewport);
}
void OpenGLRenderer::setupCameraPerspective(float pitch, float heading, float fov) {
BaseRenderer::setupCameraPerspective(pitch, heading, fov);
Common::Rect frame = frameViewport();
glViewport(frame.left, frame.top, frame.width(), frame.height());
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(_projectionMatrix.getData());
glMatrixMode(GL_MODELVIEW);
glLoadMatrixf(_modelViewMatrix.getData());
}
void ShaderRenderer::setupCameraPerspective(float pitch, float heading, float fov) {
Renderer::setupCameraPerspective(pitch, heading, fov);
Common::Rect frame = frameViewport();
glViewport(frame.left, frame.top, frame.width(), frame.height());
}
void BaseRenderer::screenPosToDirection(const Common::Point screen, float &pitch, float &heading) {
// Screen coords to 3D coords
Math::Vector3d obj;
Math::gluMathUnProject(Math::Vector3d(screen.x, _system->getHeight() - screen.y, 0.9f), _mvpMatrix, frameViewport(), obj);
// 3D coords to polar coords
obj.normalize();
Math::Vector2d horizontalProjection = Math::Vector2d(obj.x(), obj.z());
horizontalProjection.normalize();
pitch = 90 - Math::Angle::arcCosine(obj.y()).getDegrees();
heading = Math::Angle::arcCosine(horizontalProjection.getY()).getDegrees();
if (horizontalProjection.getX() > 0.0)
heading = 360 - heading;
}
Common::Point BaseRenderer::frameCenter() const {
Common::Rect screen = viewport();
Common::Rect frame = frameViewport();
return Common::Point((frame.left + frame.right) / 2, screen.top + screen.bottom - (frame.top + frame.bottom) / 2);
}
