nuclear@1: #include "opengl.h"
nuclear@1: #include "camera.h"
nuclear@1: 
nuclear@1: Camera::Camera()
nuclear@1: {
nuclear@1: 	inval_cache();
nuclear@1: }
nuclear@1: 
nuclear@1: Camera::~Camera()
nuclear@1: {
nuclear@1: }
nuclear@1: 
nuclear@1: void Camera::calc_inv_matrix(Matrix4x4 *mat) const
nuclear@1: {
nuclear@1: 	*mat = matrix().inverse();
nuclear@1: }
nuclear@1: 
nuclear@1: void Camera::set_glmat(const Matrix4x4 &mat) const
nuclear@1: {
nuclear@1: #ifdef SINGLE_PRECISION_MATH
nuclear@1: 	if(glLoadTransposeMatrixfARB) {
nuclear@1: 		glLoadTransposeMatrixfARB((float*)&mat);
nuclear@1: 	} else {
nuclear@1: 		Matrix4x4 tmat = mat.transposed();
nuclear@1: 		glLoadMatrixf((float*)&tmat);
nuclear@1: 	}
nuclear@1: #else
nuclear@1: 	if(glLoadTransposeMatrixdARB) {
nuclear@1: 		glLoadTransposeMatrixdARB((double*)&mat);
nuclear@1: 	} else {
nuclear@1: 		Matrix4x4 tmat = mat.transposed();
nuclear@1: 		glLoadMatrixd((double*)&tmat);
nuclear@1: 	}
nuclear@1: #endif
nuclear@1: }
nuclear@1: 
nuclear@1: const Matrix4x4 &Camera::matrix() const
nuclear@1: {
nuclear@1: 	if(!mcache.valid) {
nuclear@1: 		calc_matrix(&mcache.mat);
nuclear@1: 		mcache.valid = true;
nuclear@1: 	}
nuclear@1: 	return mcache.mat;
nuclear@1: }
nuclear@1: 
nuclear@1: const Matrix4x4 &Camera::inv_matrix() const
nuclear@1: {
nuclear@1: 	if(!mcache_inv.valid) {
nuclear@1: 		calc_inv_matrix(&mcache_inv.mat);
nuclear@1: 		mcache_inv.valid = true;
nuclear@1: 	}
nuclear@1: 	return mcache_inv.mat;
nuclear@1: }
nuclear@1: 
nuclear@1: void Camera::use() const
nuclear@1: {
nuclear@1: 	set_glmat(matrix());
nuclear@1: }
nuclear@1: 
nuclear@1: void Camera::use_inverse() const
nuclear@1: {
nuclear@1: 	set_glmat(inv_matrix());
nuclear@1: }
nuclear@1: 
nuclear@1: void Camera::input_move(float x, float y, float z)
nuclear@1: {
nuclear@1: }
nuclear@1: 
nuclear@1: void Camera::input_rotate(float x, float y, float z)
nuclear@1: {
nuclear@1: }
nuclear@1: 
nuclear@1: void Camera::input_zoom(float factor)
nuclear@1: {
nuclear@1: }
nuclear@1: 
nuclear@1: 
nuclear@1: // ---- orbit camera ----
nuclear@1: 
nuclear@1: OrbitCamera::OrbitCamera()
nuclear@1: {
nuclear@1: 	theta = 0.0;
nuclear@1: 	phi = 0.0;
nuclear@1: 	rad = 10.0;
nuclear@1: }
nuclear@1: 
nuclear@1: OrbitCamera::~OrbitCamera()
nuclear@1: {
nuclear@1: }
nuclear@1: 
nuclear@1: void OrbitCamera::calc_matrix(Matrix4x4 *mat) const
nuclear@1: {
nuclear@1: 	mat->reset_identity();
nuclear@1: 	mat->translate(Vector3(0, 0, -rad));
nuclear@1: 	mat->rotate(Vector3(phi, 0, 0));
nuclear@1: 	mat->rotate(Vector3(0, theta, 0));
nuclear@1: }
nuclear@1: 
nuclear@1: void OrbitCamera::calc_inv_matrix(Matrix4x4 *mat) const
nuclear@1: {
nuclear@1: 	mat->reset_identity();
nuclear@1: 	mat->rotate(Vector3(0, theta, 0));
nuclear@1: 	mat->rotate(Vector3(phi, 0, 0));
nuclear@1: 	mat->translate(Vector3(0, 0, -rad));
nuclear@1: }
nuclear@1: 
nuclear@1: void OrbitCamera::input_rotate(float x, float y, float z)
nuclear@1: {
nuclear@1: 	theta += x;
nuclear@1: 	phi += y;
nuclear@1: 
nuclear@1: 	if(phi < -M_PI / 2)
nuclear@1: 		phi = -M_PI / 2;
nuclear@1: 	if(phi > M_PI)
nuclear@1: 		phi = M_PI;
nuclear@1: 
nuclear@1: 	inval_cache();
nuclear@1: }
nuclear@1: 
nuclear@1: void OrbitCamera::input_zoom(float factor)
nuclear@1: {
nuclear@1: 	rad += factor;
nuclear@1: 	if(rad < 0.0)
nuclear@1: 		rad = 0.0;
nuclear@1: 
nuclear@1: 	inval_cache();
nuclear@1: }
nuclear@1: 
nuclear@1: 
nuclear@1: FlyCamera::FlyCamera()
nuclear@1: {
nuclear@1: 	pos.z = 10.0f;
nuclear@1: }
nuclear@1: 
nuclear@1: void FlyCamera::calc_matrix(Matrix4x4 *mat) const
nuclear@1: {
nuclear@1: 	/*mat->reset_identity();
nuclear@1: 	mat->translate(-pos);
nuclear@1: 	*mat = *mat * Matrix4x4(rot.get_rotation_matrix());
nuclear@1: 	mat->translate(pos);*/
nuclear@1: 	//mat->translate(-pos.transformed(rot));
nuclear@1: 
nuclear@1: 	Matrix3x3 qmat = rot.get_rotation_matrix();
nuclear@1: 
nuclear@1: 	Vector3 ivec = qmat.get_row_vector(0);
nuclear@1: 	Vector3 jvec = qmat.get_row_vector(1);
nuclear@1: 	Vector3 kvec = qmat.get_row_vector(2);
nuclear@1: 
nuclear@1: 	*mat = Matrix4x4(qmat);
nuclear@1: 	/*Vector3 trans_x = ivec * pos;
nuclear@1: 	Vector3 trans_y = jvec * pos;
nuclear@1: 	Vector3 trans_z = kvec * pos;
nuclear@1: 	Vector3 trans = trans_x + trans_y + trans_z;*/
nuclear@1: 	Vector3 trans;
nuclear@1: 	trans.x = dot_product(ivec, pos);
nuclear@1: 	trans.y = dot_product(jvec, pos);
nuclear@1: 	trans.z = dot_product(kvec, pos);
nuclear@1: 	mat->set_column_vector(-trans, 3);
nuclear@1: }
nuclear@1: 
nuclear@1: /*void FlyCamera::calc_inv_matrix(Matrix4x4 *mat) const
nuclear@1: {
nuclear@1: 	mat->set_translation(pos);
nuclear@1: 	*mat = *mat * Matrix4x4(rot.get_rotation_matrix());
nuclear@1: }*/
nuclear@1: 
nuclear@1: const Vector3 &FlyCamera::get_position() const
nuclear@1: {
nuclear@1: 	return pos;
nuclear@1: }
nuclear@1: 
nuclear@1: const Quaternion &FlyCamera::get_rotation() const
nuclear@1: {
nuclear@1: 	return rot;
nuclear@1: }
nuclear@1: 
nuclear@1: void FlyCamera::input_move(float x, float y, float z)
nuclear@1: {
nuclear@1: 	pos += Vector3(x, y, z);
nuclear@1: 	inval_cache();
nuclear@1: }
nuclear@1: 
nuclear@1: void FlyCamera::input_rotate(float x, float y, float z)
nuclear@1: {
nuclear@1: 	Vector3 axis(x, y, z);
nuclear@1: 	float axis_len = axis.length();
nuclear@1: 	rot.rotate(axis / axis_len, axis_len);
nuclear@1: 	rot.normalize();
nuclear@1: 	inval_cache();
nuclear@1: }