summaryrefslogtreecommitdiff
path: root/core/math/projection.h
diff options
context:
space:
mode:
Diffstat (limited to 'core/math/projection.h')
-rw-r--r--core/math/projection.h167
1 files changed, 167 insertions, 0 deletions
diff --git a/core/math/projection.h b/core/math/projection.h
new file mode 100644
index 0000000000..a3d2d7720b
--- /dev/null
+++ b/core/math/projection.h
@@ -0,0 +1,167 @@
+/*************************************************************************/
+/* projection.h */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
+/* */
+/* 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 PROJECTION_H
+#define PROJECTION_H
+
+#include "core/math/math_defs.h"
+#include "core/math/vector3.h"
+#include "core/math/vector4.h"
+#include "core/templates/vector.h"
+
+struct AABB;
+struct Plane;
+struct Rect2;
+struct Transform3D;
+struct Vector2;
+
+struct Projection {
+ enum Planes {
+ PLANE_NEAR,
+ PLANE_FAR,
+ PLANE_LEFT,
+ PLANE_TOP,
+ PLANE_RIGHT,
+ PLANE_BOTTOM
+ };
+
+ Vector4 matrix[4];
+
+ _FORCE_INLINE_ const Vector4 &operator[](const int p_axis) const {
+ DEV_ASSERT((unsigned int)p_axis < 4);
+ return matrix[p_axis];
+ }
+
+ _FORCE_INLINE_ Vector4 &operator[](const int p_axis) {
+ DEV_ASSERT((unsigned int)p_axis < 4);
+ return matrix[p_axis];
+ }
+
+ float determinant() const;
+ void set_identity();
+ void set_zero();
+ void set_light_bias();
+ void set_depth_correction(bool p_flip_y = true);
+
+ void set_light_atlas_rect(const Rect2 &p_rect);
+ void set_perspective(real_t p_fovy_degrees, real_t p_aspect, real_t p_z_near, real_t p_z_far, bool p_flip_fov = false);
+ void set_perspective(real_t p_fovy_degrees, real_t p_aspect, real_t p_z_near, real_t p_z_far, bool p_flip_fov, int p_eye, real_t p_intraocular_dist, real_t p_convergence_dist);
+ void set_for_hmd(int p_eye, real_t p_aspect, real_t p_intraocular_dist, real_t p_display_width, real_t p_display_to_lens, real_t p_oversample, real_t p_z_near, real_t p_z_far);
+ void set_orthogonal(real_t p_left, real_t p_right, real_t p_bottom, real_t p_top, real_t p_znear, real_t p_zfar);
+ void set_orthogonal(real_t p_size, real_t p_aspect, real_t p_znear, real_t p_zfar, bool p_flip_fov = false);
+ void set_frustum(real_t p_left, real_t p_right, real_t p_bottom, real_t p_top, real_t p_near, real_t p_far);
+ void set_frustum(real_t p_size, real_t p_aspect, Vector2 p_offset, real_t p_near, real_t p_far, bool p_flip_fov = false);
+ void adjust_perspective_znear(real_t p_new_znear);
+
+ static Projection create_depth_correction(bool p_flip_y);
+ static Projection create_light_atlas_rect(const Rect2 &p_rect);
+ static Projection create_perspective(real_t p_fovy_degrees, real_t p_aspect, real_t p_z_near, real_t p_z_far, bool p_flip_fov = false);
+ static Projection create_perspective_hmd(real_t p_fovy_degrees, real_t p_aspect, real_t p_z_near, real_t p_z_far, bool p_flip_fov, int p_eye, real_t p_intraocular_dist, real_t p_convergence_dist);
+ static Projection create_for_hmd(int p_eye, real_t p_aspect, real_t p_intraocular_dist, real_t p_display_width, real_t p_display_to_lens, real_t p_oversample, real_t p_z_near, real_t p_z_far);
+ static Projection create_orthogonal(real_t p_left, real_t p_right, real_t p_bottom, real_t p_top, real_t p_znear, real_t p_zfar);
+ static Projection create_orthogonal_aspect(real_t p_size, real_t p_aspect, real_t p_znear, real_t p_zfar, bool p_flip_fov = false);
+ static Projection create_frustum(real_t p_left, real_t p_right, real_t p_bottom, real_t p_top, real_t p_near, real_t p_far);
+ static Projection create_frustum_aspect(real_t p_size, real_t p_aspect, Vector2 p_offset, real_t p_near, real_t p_far, bool p_flip_fov = false);
+ static Projection create_fit_aabb(const AABB &p_aabb);
+ Projection perspective_znear_adjusted(real_t p_new_znear) const;
+ Plane get_projection_plane(Planes p_plane) const;
+ Projection flipped_y() const;
+ Projection jitter_offseted(const Vector2 &p_offset) const;
+
+ static real_t get_fovy(real_t p_fovx, real_t p_aspect) {
+ return Math::rad2deg(Math::atan(p_aspect * Math::tan(Math::deg2rad(p_fovx) * 0.5)) * 2.0);
+ }
+
+ real_t get_z_far() const;
+ real_t get_z_near() const;
+ real_t get_aspect() const;
+ real_t get_fov() const;
+ bool is_orthogonal() const;
+
+ Vector<Plane> get_projection_planes(const Transform3D &p_transform) const;
+
+ bool get_endpoints(const Transform3D &p_transform, Vector3 *p_8points) const;
+ Vector2 get_viewport_half_extents() const;
+ Vector2 get_far_plane_half_extents() const;
+
+ void invert();
+ Projection inverse() const;
+
+ Projection operator*(const Projection &p_matrix) const;
+
+ Plane xform4(const Plane &p_vec4) const;
+ _FORCE_INLINE_ Vector3 xform(const Vector3 &p_vec3) const;
+
+ Vector4 xform(const Vector4 &p_vec4) const;
+ Vector4 xform_inv(const Vector4 &p_vec4) const;
+
+ operator String() const;
+
+ void scale_translate_to_fit(const AABB &p_aabb);
+ void add_jitter_offset(const Vector2 &p_offset);
+ void make_scale(const Vector3 &p_scale);
+ int get_pixels_per_meter(int p_for_pixel_width) const;
+ operator Transform3D() const;
+
+ void flip_y();
+
+ bool operator==(const Projection &p_cam) const {
+ for (uint32_t i = 0; i < 4; i++) {
+ for (uint32_t j = 0; j < 4; j++) {
+ if (matrix[i][j] != p_cam.matrix[i][j]) {
+ return false;
+ }
+ }
+ }
+ return true;
+ }
+
+ bool operator!=(const Projection &p_cam) const {
+ return !(*this == p_cam);
+ }
+
+ float get_lod_multiplier() const;
+
+ Projection();
+ Projection(const Vector4 &p_x, const Vector4 &p_y, const Vector4 &p_z, const Vector4 &p_w);
+ Projection(const Transform3D &p_transform);
+ ~Projection();
+};
+
+Vector3 Projection::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];
+ real_t 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 // PROJECTION_H
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 19:14:51 +0000