GODOT IS OPEN SOURCE

1 files changed, 218 insertions, 0 deletions

diff --git a/core/math/transform.cpp b/core/math/transform.cpp
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+++ b/core/math/transform.cpp
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+/*************************************************************************/
+/*  transform.cpp                                                        */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#include "transform.h"
+#include "math_funcs.h"
+#include "os/copymem.h"
+#include "print_string.h"
+	
+
+void Transform::affine_invert() {
+
+	basis.invert();
+	origin = basis.xform(-origin);
+}
+
+Transform Transform::affine_inverse() const {
+
+	Transform ret=*this;
+	ret.affine_invert();
+	return ret;
+
+}
+
+
+void Transform::invert() {
+
+	basis.transpose();
+	origin = basis.xform(-origin);	
+}
+
+Transform Transform::inverse() const {
+
+	Transform ret=*this;
+	ret.invert();
+	return ret;
+}
+
+
+void Transform::rotate(const Vector3& p_axis,real_t p_phi) {
+
+	*this = *this * Transform( Matrix3( p_axis, p_phi ), Vector3()  );
+}
+
+Transform Transform::rotated(const Vector3& p_axis,real_t p_phi) const{
+
+	return *this * Transform( Matrix3( p_axis, p_phi ), Vector3()  );
+}
+
+void Transform::rotate_basis(const Vector3& p_axis,real_t p_phi) {
+
+	basis.rotate(p_axis,p_phi);
+}
+
+Transform Transform::looking_at( const Vector3& p_target, const Vector3& p_up ) const {
+
+	Transform t = *this;
+	t.set_look_at(origin,p_target,p_up);
+	return t;
+}
+
+void Transform::set_look_at( const Vector3& p_eye, const Vector3& p_target, const Vector3& p_up ) {
+
+	// Reference: MESA source code
+	Vector3 v_x, v_y, v_z;
+	
+	/* Make rotation matrix */
+	
+	/* Z vector */
+	v_z = p_eye - p_target;
+	
+	v_z.normalize();
+	
+	v_y = p_up;
+	
+
+	v_x=v_y.cross(v_z);
+	
+	/* Recompute Y = Z cross X */
+	v_y=v_z.cross(v_x);
+	
+	v_x.normalize();
+	v_y.normalize();
+	
+	basis.set_axis(0,v_x);
+	basis.set_axis(1,v_y);
+	basis.set_axis(2,v_z);
+	origin=p_eye;
+	
+}
+
+Transform Transform::interpolate_with(const Transform& p_transform, float p_c) const {
+
+	/* not sure if very "efficient" but good enough? */
+
+	Vector3 src_scale = basis.get_scale();
+	Quat src_rot = basis;
+	Vector3 src_loc = origin;
+
+	Vector3 dst_scale = p_transform.basis.get_scale();
+	Quat dst_rot = p_transform.basis;
+	Vector3 dst_loc = p_transform.origin;
+
+	Transform dst;
+	dst.basis=src_rot.slerp(dst_rot,p_c);
+	dst.basis.scale(src_scale.linear_interpolate(dst_scale,p_c));
+	dst.origin=src_loc.linear_interpolate(dst_loc,p_c);
+
+	return dst;
+}
+
+void Transform::scale(const Vector3& p_scale) {
+
+	basis.scale(p_scale);
+	origin*=p_scale;
+}
+
+Transform Transform::scaled(const Vector3& p_scale) const {
+
+	Transform t = *this;
+	t.scale(p_scale);
+	return t;
+}
+
+void Transform::scale_basis(const Vector3& p_scale) {
+
+	basis.scale(p_scale);
+}
+
+void Transform::translate( real_t p_tx, real_t p_ty, real_t p_tz)  {
+	translate( Vector3(p_tx,p_ty,p_tz) );
+
+}
+void Transform::translate( const Vector3& p_translation ) {
+
+	for( int i = 0; i < 3; i++ ) {
+		origin[i] += basis[i].dot(p_translation);
+	}
+}
+
+Transform Transform::translated( const Vector3& p_translation ) const {
+
+	Transform t=*this;
+	t.translate(p_translation);
+	return t;
+}
+
+void Transform::orthonormalize() {
+
+	basis.orthonormalize();
+}
+
+Transform Transform::orthonormalized() const {
+
+	Transform _copy = *this;
+	_copy.orthonormalize();
+	return _copy;
+}
+
+bool Transform::operator==(const Transform& p_transform) const {
+
+	return (basis==p_transform.basis && origin==p_transform.origin);
+}
+bool Transform::operator!=(const Transform& p_transform) const {
+
+	return (basis!=p_transform.basis || origin!=p_transform.origin);
+}
+
+void Transform::operator*=(const Transform& p_transform) {
+
+	origin=xform(p_transform.origin);
+	basis*=p_transform.basis;	
+}
+
+Transform Transform::operator*(const Transform& p_transform) const {
+
+	Transform t=*this;
+	t*=p_transform;
+	return t;
+}
+
+Transform::operator String() const {
+
+	return basis.operator String() + " - " + origin.operator String();
+}
+
+
+Transform::Transform(const Matrix3& p_basis, const Vector3& p_origin) {
+
+	basis=p_basis;
+	origin=p_origin;
+}
+
+