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Diffstat (limited to 'core/math/camera_matrix.h')
| -rw-r--r-- | core/math/camera_matrix.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/core/math/camera_matrix.h b/core/math/camera_matrix.h new file mode 100644 index 0000000000..6ffcb0ed0b --- /dev/null +++ b/core/math/camera_matrix.h @@ -0,0 +1,106 @@ +/*************************************************************************/ +/* camera_matrix.h */ +/*************************************************************************/ +/* 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. */ +/*************************************************************************/ +#ifndef CAMERA_MATRIX_H +#define CAMERA_MATRIX_H + +#include "transform.h" +/** + @author Juan Linietsky <reduzio@gmail.com> +*/ + + + +struct CameraMatrix { + + enum Planes { + PLANE_NEAR, + PLANE_FAR, + PLANE_LEFT, + PLANE_TOP, + PLANE_RIGHT, + PLANE_BOTTOM + }; + + float matrix[4][4]; + + + void set_identity(); + void set_zero(); + void set_light_bias(); + void set_perspective(float p_fovy_degrees, float p_aspect, float p_z_near, float p_z_far,bool p_flip_fov=false); + void set_orthogonal(float p_left, float p_right, float p_bottom, float p_top, float p_znear, float p_zfar); + void set_orthogonal(float p_size, float p_aspect, float p_znear, float p_zfar,bool p_flip_fov=false); + void set_frustum(float p_left, float p_right, float p_bottom, float p_top, float p_near, float p_far); + + static float get_fovy(float p_fovx,float p_aspect) { + + return Math::atan(p_aspect * Math::tan(p_fovx * 0.5))*2.0; + } + + float get_z_far() const; + float get_z_near() const; + float get_aspect() const; + float get_fov() const; + + Vector<Plane> get_projection_planes(const Transform& p_transform) const; + + bool get_endpoints(const Transform& p_transform,Vector3 *p_8points) const; + void get_viewport_size(float& r_width, float& r_height) const; + + void invert(); + CameraMatrix inverse() const; + + CameraMatrix operator*(const CameraMatrix& p_matrix) const; + + Plane xform4(const Plane& p_vec4); + _FORCE_INLINE_ Vector3 xform(const Vector3& p_vec3) const; + + operator String() const; + + void scale_translate_to_fit(const AABB& p_aabb); + void make_scale(const Vector3 &p_scale); + operator Transform() const; + + CameraMatrix(); + CameraMatrix(const Transform& p_transform); + ~CameraMatrix(); + +}; + +Vector3 CameraMatrix::xform(const Vector3& p_vec3) const { + + Vector3 ret; + ret.x = matrix[0][0] * p_vec3.x + matrix[1][0] * p_vec3.y + matrix[2][0] * p_vec3.z + matrix[3][0]; + ret.y = matrix[0][1] * p_vec3.x + matrix[1][1] * p_vec3.y + matrix[2][1] * p_vec3.z + matrix[3][1]; + ret.z = matrix[0][2] * p_vec3.x + matrix[1][2] * p_vec3.y + matrix[2][2] * p_vec3.z + matrix[3][2]; + float w = matrix[0][3] * p_vec3.x + matrix[1][3] * p_vec3.y + matrix[2][3] * p_vec3.z + matrix[3][3]; + return ret/w; +} + +#endif |