nuclear@1: #include "camera.h"
nuclear@15: #include "rayzor.h"
nuclear@1: 
nuclear@1: Camera::Camera()
nuclear@1: {
nuclear@12: 	type = NODE_CAMERA;
nuclear@15: 	fov = M_PI / 4.0;
nuclear@12: 	set_position(Vector3(0, 0, 10));
nuclear@1: }
nuclear@1: 
nuclear@1: void Camera::set_target(const Vector3 &target)
nuclear@1: {
nuclear@13: 	this->target.set_position(target);
nuclear@1: }
nuclear@1: 
nuclear@13: Vector3 Camera::get_target() const
nuclear@1: {
nuclear@13: 	return target.get_position();
nuclear@1: }
nuclear@1: 
nuclear@1: void Camera::set_fov(float fov)
nuclear@1: {
nuclear@1: 	this->fov = fov;
nuclear@1: }
nuclear@1: 
nuclear@1: float Camera::get_fov() const
nuclear@1: {
nuclear@1: 	return fov;
nuclear@1: }
nuclear@1: 
nuclear@12: void Camera::calc_matrix() const
nuclear@1: {
nuclear@15: 	if(!xform_valid) {
nuclear@15: 		xform.set_identity();
nuclear@15: 		xform.lookat(pos, target.get_position(), Vector3(0, 1, 0));
nuclear@15: 		xform_valid = true;
nuclear@15: 	}
nuclear@1: }
nuclear@12: 
nuclear@12: void Camera::draw() const
nuclear@12: {
nuclear@12: }
nuclear@12: 
nuclear@17: bool Camera::intersect(const Ray &ray, RayHit *hit) const
nuclear@12: {
nuclear@12: 	return false;
nuclear@12: }
nuclear@15: 
nuclear@15: Ray Camera::get_primary_ray(int x, int y) const
nuclear@15: {
nuclear@15: 	calc_inv_matrix();
nuclear@15: 
nuclear@15: 	float aspect = (float)fb_width / (float)fb_height;
nuclear@15: 	float pwidth = 2.0 * aspect / (float)fb_width;
nuclear@15: 	float pheight = 2.0 / (float)fb_height;
nuclear@15: 
nuclear@15: 	Vector3 dir;
nuclear@15: 	dir.x = (float)x * pwidth - aspect;
nuclear@15: 	dir.y = 1.0 - (float)y * pheight;
nuclear@15: 	dir.z = -1.0 / tan(fov / 2.0);
nuclear@15: 	dir.normalize();
nuclear@15: 
nuclear@15: 	return transform(inv_xform, Ray(Vector3(0, 0, 0), dir));
nuclear@15: }