diff --git a/include/core/CameraMatrix.hpp b/include/core/CameraMatrix.hpp new file mode 100644 index 0000000..d9bff7f --- /dev/null +++ b/include/core/CameraMatrix.hpp @@ -0,0 +1,103 @@ +#ifndef CAMERA_MATRIX_H +#define CAMERA_MATRIX_H + +#include "Defs.hpp" +#include "Plane.hpp" +#include "Rect2.hpp" +#include "Transform.hpp" + +#include + +namespace { +using namespace godot; +} // namespace + +struct CameraMatrix { + + enum Planes { + PLANE_NEAR, + PLANE_FAR, + PLANE_LEFT, + PLANE_TOP, + PLANE_RIGHT, + PLANE_BOTTOM + }; + + real_t matrix[4][4]; + + void set_identity(); + void set_zero(); + void set_light_bias(); + 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); + + static real_t get_fovy(real_t p_fovx, real_t p_aspect) { + + return rad2deg(atan(p_aspect * tan(deg2rad(p_fovx) * 0.5)) * 2.0); + } + + static inline double deg2rad(double p_y) { return p_y * Math_PI / 180.0; } + static inline float deg2rad(float p_y) { return p_y * Math_PI / 180.0; } + + static inline double rad2deg(double p_y) { return p_y * 180.0 / Math_PI; } + static inline float rad2deg(float p_y) { return p_y * 180.0 / Math_PI; } + + static inline double absd(double g) { + + union { + double d; + uint64_t i; + } u; + u.d = g; + u.i &= (uint64_t)9223372036854775807ll; + return u.d; + } + + 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; + + std::vector get_projection_planes(const Transform &p_transform) const; + + bool get_endpoints(const Transform &p_transform, Vector3 *p_8points) const; + Vector2 get_viewport_half_extents() const; + + void invert(); + CameraMatrix inverse() const; + + CameraMatrix operator*(const CameraMatrix &p_matrix) const; + + Plane xform4(const Plane &p_vec4) const; + 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); + int get_pixels_per_meter(int p_for_pixel_width) const; + 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]; + 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 diff --git a/include/core/RID.hpp b/include/core/RID.hpp index 3b3ce80..2191bbf 100644 --- a/include/core/RID.hpp +++ b/include/core/RID.hpp @@ -15,6 +15,8 @@ public: RID(Object *p); + godot_rid _get_godot_rid() const; + int32_t get_id() const; inline bool is_valid() const { diff --git a/src/core/CameraMatrix.cpp b/src/core/CameraMatrix.cpp new file mode 100644 index 0000000..9d35d5c --- /dev/null +++ b/src/core/CameraMatrix.cpp @@ -0,0 +1,683 @@ +/*************************************************************************/ +/* camera_matrix.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2020 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. */ +/*************************************************************************/ + +#include "CameraMatrix.hpp" + +void CameraMatrix::set_identity() { + + for (int i = 0; i < 4; i++) { + + for (int j = 0; j < 4; j++) { + + matrix[i][j] = (i == j) ? 1 : 0; + } + } +} + +void CameraMatrix::set_zero() { + + for (int i = 0; i < 4; i++) { + + for (int j = 0; j < 4; j++) { + + matrix[i][j] = 0; + } + } +} + +Plane CameraMatrix::xform4(const Plane &p_vec4) const { + + Plane ret; + + ret.normal.x = matrix[0][0] * p_vec4.normal.x + matrix[1][0] * p_vec4.normal.y + matrix[2][0] * p_vec4.normal.z + matrix[3][0] * p_vec4.d; + ret.normal.y = matrix[0][1] * p_vec4.normal.x + matrix[1][1] * p_vec4.normal.y + matrix[2][1] * p_vec4.normal.z + matrix[3][1] * p_vec4.d; + ret.normal.z = matrix[0][2] * p_vec4.normal.x + matrix[1][2] * p_vec4.normal.y + matrix[2][2] * p_vec4.normal.z + matrix[3][2] * p_vec4.d; + ret.d = matrix[0][3] * p_vec4.normal.x + matrix[1][3] * p_vec4.normal.y + matrix[2][3] * p_vec4.normal.z + matrix[3][3] * p_vec4.d; + return ret; +} + +void CameraMatrix::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) { + + if (p_flip_fov) { + p_fovy_degrees = get_fovy(p_fovy_degrees, 1.0 / p_aspect); + } + + real_t sine, cotangent, deltaZ; + real_t radians = p_fovy_degrees / 2.0 * Math_PI / 180.0; + + deltaZ = p_z_far - p_z_near; + sine = sin(radians); + + if ((deltaZ == 0) || (sine == 0) || (p_aspect == 0)) { + return; + } + cotangent = cos(radians) / sine; + + set_identity(); + + matrix[0][0] = cotangent / p_aspect; + matrix[1][1] = cotangent; + matrix[2][2] = -(p_z_far + p_z_near) / deltaZ; + matrix[2][3] = -1; + matrix[3][2] = -2 * p_z_near * p_z_far / deltaZ; + matrix[3][3] = 0; +} + +void CameraMatrix::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) { + if (p_flip_fov) { + p_fovy_degrees = get_fovy(p_fovy_degrees, 1.0 / p_aspect); + } + + real_t left, right, modeltranslation, ymax, xmax, frustumshift; + + ymax = p_z_near * tan(p_fovy_degrees * Math_PI / 360.0f); + xmax = ymax * p_aspect; + frustumshift = (p_intraocular_dist / 2.0) * p_z_near / p_convergence_dist; + + switch (p_eye) { + case 1: { // left eye + left = -xmax + frustumshift; + right = xmax + frustumshift; + modeltranslation = p_intraocular_dist / 2.0; + }; break; + case 2: { // right eye + left = -xmax - frustumshift; + right = xmax - frustumshift; + modeltranslation = -p_intraocular_dist / 2.0; + }; break; + default: { // mono, should give the same result as set_perspective(p_fovy_degrees,p_aspect,p_z_near,p_z_far,p_flip_fov) + left = -xmax; + right = xmax; + modeltranslation = 0.0; + }; break; + }; + + set_frustum(left, right, -ymax, ymax, p_z_near, p_z_far); + + // translate matrix by (modeltranslation, 0.0, 0.0) + CameraMatrix cm; + cm.set_identity(); + cm.matrix[3][0] = modeltranslation; + *this = *this * cm; +} + +void CameraMatrix::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) { + // we first calculate our base frustum on our values without taking our lens magnification into account. + real_t f1 = (p_intraocular_dist * 0.5) / p_display_to_lens; + real_t f2 = ((p_display_width - p_intraocular_dist) * 0.5) / p_display_to_lens; + real_t f3 = (p_display_width / 4.0) / p_display_to_lens; + + // now we apply our oversample factor to increase our FOV. how much we oversample is always a balance we strike between performance and how much + // we're willing to sacrifice in FOV. + real_t add = ((f1 + f2) * (p_oversample - 1.0)) / 2.0; + f1 += add; + f2 += add; + f3 *= p_oversample; + + // always apply KEEP_WIDTH aspect ratio + f3 /= p_aspect; + + switch (p_eye) { + case 1: { // left eye + set_frustum(-f2 * p_z_near, f1 * p_z_near, -f3 * p_z_near, f3 * p_z_near, p_z_near, p_z_far); + }; break; + case 2: { // right eye + set_frustum(-f1 * p_z_near, f2 * p_z_near, -f3 * p_z_near, f3 * p_z_near, p_z_near, p_z_far); + }; break; + default: { // mono, does not apply here! + }; break; + }; +}; + +void CameraMatrix::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) { + + set_identity(); + + matrix[0][0] = 2.0 / (p_right - p_left); + matrix[3][0] = -((p_right + p_left) / (p_right - p_left)); + matrix[1][1] = 2.0 / (p_top - p_bottom); + matrix[3][1] = -((p_top + p_bottom) / (p_top - p_bottom)); + matrix[2][2] = -2.0 / (p_zfar - p_znear); + matrix[3][2] = -((p_zfar + p_znear) / (p_zfar - p_znear)); + matrix[3][3] = 1.0; +} + +void CameraMatrix::set_orthogonal(real_t p_size, real_t p_aspect, real_t p_znear, real_t p_zfar, bool p_flip_fov) { + + if (!p_flip_fov) { + p_size *= p_aspect; + } + + set_orthogonal(-p_size / 2, +p_size / 2, -p_size / p_aspect / 2, +p_size / p_aspect / 2, p_znear, p_zfar); +} + +void CameraMatrix::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) { + + ERR_FAIL_COND(p_right <= p_left); + ERR_FAIL_COND(p_top <= p_bottom); + ERR_FAIL_COND(p_far <= p_near); + + real_t *te = &matrix[0][0]; + real_t x = 2 * p_near / (p_right - p_left); + real_t y = 2 * p_near / (p_top - p_bottom); + + real_t a = (p_right + p_left) / (p_right - p_left); + real_t b = (p_top + p_bottom) / (p_top - p_bottom); + real_t c = -(p_far + p_near) / (p_far - p_near); + real_t d = -2 * p_far * p_near / (p_far - p_near); + + te[0] = x; + te[1] = 0; + te[2] = 0; + te[3] = 0; + te[4] = 0; + te[5] = y; + te[6] = 0; + te[7] = 0; + te[8] = a; + te[9] = b; + te[10] = c; + te[11] = -1; + te[12] = 0; + te[13] = 0; + te[14] = d; + te[15] = 0; +} + +void CameraMatrix::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) { + if (!p_flip_fov) { + p_size *= p_aspect; + } + + set_frustum(-p_size / 2 + p_offset.x, +p_size / 2 + p_offset.x, -p_size / p_aspect / 2 + p_offset.y, +p_size / p_aspect / 2 + p_offset.y, p_near, p_far); +} + +real_t CameraMatrix::get_z_far() const { + + const real_t *matrix = (const real_t *)this->matrix; + Plane new_plane = Plane(matrix[3] - matrix[2], + matrix[7] - matrix[6], + matrix[11] - matrix[10], + matrix[15] - matrix[14]); + + new_plane.normal = -new_plane.normal; + new_plane.normalize(); + + return new_plane.d; +} +real_t CameraMatrix::get_z_near() const { + + const real_t *matrix = (const real_t *)this->matrix; + Plane new_plane = Plane(matrix[3] + matrix[2], + matrix[7] + matrix[6], + matrix[11] + matrix[10], + -matrix[15] - matrix[14]); + + new_plane.normalize(); + return new_plane.d; +} + +Vector2 CameraMatrix::get_viewport_half_extents() const { + + const real_t *matrix = (const real_t *)this->matrix; + ///////--- Near Plane ---/////// + Plane near_plane = Plane(matrix[3] + matrix[2], + matrix[7] + matrix[6], + matrix[11] + matrix[10], + -matrix[15] - matrix[14]); + near_plane.normalize(); + + ///////--- Right Plane ---/////// + Plane right_plane = Plane(matrix[3] - matrix[0], + matrix[7] - matrix[4], + matrix[11] - matrix[8], + -matrix[15] + matrix[12]); + right_plane.normalize(); + + Plane top_plane = Plane(matrix[3] - matrix[1], + matrix[7] - matrix[5], + matrix[11] - matrix[9], + -matrix[15] + matrix[13]); + top_plane.normalize(); + + Vector3 res; + near_plane.intersect_3(right_plane, top_plane, &res); + + return Vector2(res.x, res.y); +} + +bool CameraMatrix::get_endpoints(const Transform &p_transform, Vector3 *p_8points) const { + + std::vector planes = get_projection_planes(Transform()); + const Planes intersections[8][3] = { + { PLANE_FAR, PLANE_LEFT, PLANE_TOP }, + { PLANE_FAR, PLANE_LEFT, PLANE_BOTTOM }, + { PLANE_FAR, PLANE_RIGHT, PLANE_TOP }, + { PLANE_FAR, PLANE_RIGHT, PLANE_BOTTOM }, + { PLANE_NEAR, PLANE_LEFT, PLANE_TOP }, + { PLANE_NEAR, PLANE_LEFT, PLANE_BOTTOM }, + { PLANE_NEAR, PLANE_RIGHT, PLANE_TOP }, + { PLANE_NEAR, PLANE_RIGHT, PLANE_BOTTOM }, + }; + + for (int i = 0; i < 8; i++) { + + Vector3 point; + bool res = planes[intersections[i][0]].intersect_3(planes[intersections[i][1]], planes[intersections[i][2]], &point); + ERR_FAIL_COND_V(!res, false); + p_8points[i] = p_transform.xform(point); + } + + return true; +} + +std::vector CameraMatrix::get_projection_planes(const Transform &p_transform) const { + + /** Fast Plane Extraction from combined modelview/projection matrices. + * References: + * https://web.archive.org/web/20011221205252/http://www.markmorley.com/opengl/frustumculling.html + * https://web.archive.org/web/20061020020112/http://www2.ravensoft.com/users/ggribb/plane%20extraction.pdf + */ + + std::vector planes; + + const real_t *matrix = (const real_t *)this->matrix; + + Plane new_plane; + + ///////--- Near Plane ---/////// + new_plane = Plane(matrix[3] + matrix[2], + matrix[7] + matrix[6], + matrix[11] + matrix[10], + matrix[15] + matrix[14]); + + new_plane.normal = -new_plane.normal; + new_plane.normalize(); + + planes.push_back(p_transform.xform(new_plane)); + + ///////--- Far Plane ---/////// + new_plane = Plane(matrix[3] - matrix[2], + matrix[7] - matrix[6], + matrix[11] - matrix[10], + matrix[15] - matrix[14]); + + new_plane.normal = -new_plane.normal; + new_plane.normalize(); + + planes.push_back(p_transform.xform(new_plane)); + + ///////--- Left Plane ---/////// + new_plane = Plane(matrix[3] + matrix[0], + matrix[7] + matrix[4], + matrix[11] + matrix[8], + matrix[15] + matrix[12]); + + new_plane.normal = -new_plane.normal; + new_plane.normalize(); + + planes.push_back(p_transform.xform(new_plane)); + + ///////--- Top Plane ---/////// + new_plane = Plane(matrix[3] - matrix[1], + matrix[7] - matrix[5], + matrix[11] - matrix[9], + matrix[15] - matrix[13]); + + new_plane.normal = -new_plane.normal; + new_plane.normalize(); + + planes.push_back(p_transform.xform(new_plane)); + + ///////--- Right Plane ---/////// + new_plane = Plane(matrix[3] - matrix[0], + matrix[7] - matrix[4], + matrix[11] - matrix[8], + matrix[15] - matrix[12]); + + new_plane.normal = -new_plane.normal; + new_plane.normalize(); + + planes.push_back(p_transform.xform(new_plane)); + + ///////--- Bottom Plane ---/////// + new_plane = Plane(matrix[3] + matrix[1], + matrix[7] + matrix[5], + matrix[11] + matrix[9], + matrix[15] + matrix[13]); + + new_plane.normal = -new_plane.normal; + new_plane.normalize(); + + planes.push_back(p_transform.xform(new_plane)); + + return planes; +} + +CameraMatrix CameraMatrix::inverse() const { + + CameraMatrix cm = *this; + cm.invert(); + return cm; +} + +void CameraMatrix::invert() { + + int i, j, k; + int pvt_i[4], pvt_j[4]; /* Locations of pivot matrix */ + real_t pvt_val; /* Value of current pivot element */ + real_t hold; /* Temporary storage */ + real_t determinat; /* Determinant */ + + determinat = 1.0; + for (k = 0; k < 4; k++) { + /** Locate k'th pivot element **/ + pvt_val = matrix[k][k]; /** Initialize for search **/ + pvt_i[k] = k; + pvt_j[k] = k; + for (i = k; i < 4; i++) { + for (j = k; j < 4; j++) { + if (absd(matrix[i][j]) > absd(pvt_val)) { + pvt_i[k] = i; + pvt_j[k] = j; + pvt_val = matrix[i][j]; + } + } + } + + /** Product of pivots, gives determinant when finished **/ + determinat *= pvt_val; + if (absd(determinat) < 1e-7) { + return; //(false); /** Matrix is singular (zero determinant). **/ + } + + /** "Interchange" rows (with sign change stuff) **/ + i = pvt_i[k]; + if (i != k) { /** If rows are different **/ + for (j = 0; j < 4; j++) { + hold = -matrix[k][j]; + matrix[k][j] = matrix[i][j]; + matrix[i][j] = hold; + } + } + + /** "Interchange" columns **/ + j = pvt_j[k]; + if (j != k) { /** If columns are different **/ + for (i = 0; i < 4; i++) { + hold = -matrix[i][k]; + matrix[i][k] = matrix[i][j]; + matrix[i][j] = hold; + } + } + + /** Divide column by minus pivot value **/ + for (i = 0; i < 4; i++) { + if (i != k) matrix[i][k] /= (-pvt_val); + } + + /** Reduce the matrix **/ + for (i = 0; i < 4; i++) { + hold = matrix[i][k]; + for (j = 0; j < 4; j++) { + if (i != k && j != k) matrix[i][j] += hold * matrix[k][j]; + } + } + + /** Divide row by pivot **/ + for (j = 0; j < 4; j++) { + if (j != k) matrix[k][j] /= pvt_val; + } + + /** Replace pivot by reciprocal (at last we can touch it). **/ + matrix[k][k] = 1.0 / pvt_val; + } + + /* That was most of the work, one final pass of row/column interchange */ + /* to finish */ + for (k = 4 - 2; k >= 0; k--) { /* Don't need to work with 1 by 1 corner*/ + i = pvt_j[k]; /* Rows to swap correspond to pivot COLUMN */ + if (i != k) { /* If rows are different */ + for (j = 0; j < 4; j++) { + hold = matrix[k][j]; + matrix[k][j] = -matrix[i][j]; + matrix[i][j] = hold; + } + } + + j = pvt_i[k]; /* Columns to swap correspond to pivot ROW */ + if (j != k) /* If columns are different */ + for (i = 0; i < 4; i++) { + hold = matrix[i][k]; + matrix[i][k] = -matrix[i][j]; + matrix[i][j] = hold; + } + } +} + +CameraMatrix::CameraMatrix() { + + set_identity(); +} + +CameraMatrix CameraMatrix::operator*(const CameraMatrix &p_matrix) const { + + CameraMatrix new_matrix; + + for (int j = 0; j < 4; j++) { + for (int i = 0; i < 4; i++) { + real_t ab = 0; + for (int k = 0; k < 4; k++) + ab += matrix[k][i] * p_matrix.matrix[j][k]; + new_matrix.matrix[j][i] = ab; + } + } + + return new_matrix; +} + +void CameraMatrix::set_light_bias() { + + real_t *m = &matrix[0][0]; + + m[0] = 0.5; + m[1] = 0.0; + m[2] = 0.0; + m[3] = 0.0; + m[4] = 0.0; + m[5] = 0.5; + m[6] = 0.0; + m[7] = 0.0; + m[8] = 0.0; + m[9] = 0.0; + m[10] = 0.5; + m[11] = 0.0; + m[12] = 0.5; + m[13] = 0.5; + m[14] = 0.5; + m[15] = 1.0; +} + +void CameraMatrix::set_light_atlas_rect(const Rect2 &p_rect) { + + real_t *m = &matrix[0][0]; + + m[0] = p_rect.size.width; + m[1] = 0.0; + m[2] = 0.0; + m[3] = 0.0; + m[4] = 0.0; + m[5] = p_rect.size.height; + m[6] = 0.0; + m[7] = 0.0; + m[8] = 0.0; + m[9] = 0.0; + m[10] = 1.0; + m[11] = 0.0; + m[12] = p_rect.position.x; + m[13] = p_rect.position.y; + m[14] = 0.0; + m[15] = 1.0; +} + +CameraMatrix::operator String() const { + + String str; + for (int i = 0; i < 4; i++) + for (int j = 0; j < 4; j++) + str += String((j > 0) ? ", " : "\n") + String::num(matrix[i][j]); + + return str; +} + +real_t CameraMatrix::get_aspect() const { + + Vector2 vp_he = get_viewport_half_extents(); + return vp_he.x / vp_he.y; +} + +int CameraMatrix::get_pixels_per_meter(int p_for_pixel_width) const { + + Vector3 result = xform(Vector3(1, 0, -1)); + + return int((result.x * 0.5 + 0.5) * p_for_pixel_width); +} + +bool CameraMatrix::is_orthogonal() const { + + return matrix[3][3] == 1.0; +} + +real_t CameraMatrix::get_fov() const { + const real_t *matrix = (const real_t *)this->matrix; + + Plane right_plane = Plane(matrix[3] - matrix[0], + matrix[7] - matrix[4], + matrix[11] - matrix[8], + -matrix[15] + matrix[12]); + right_plane.normalize(); + + if ((matrix[8] == 0) && (matrix[9] == 0)) { + return rad2deg(acos(abs(right_plane.normal.x))) * 2.0; + } else { + // our frustum is asymmetrical need to calculate the left planes angle separately.. + Plane left_plane = Plane(matrix[3] + matrix[0], + matrix[7] + matrix[4], + matrix[11] + matrix[8], + matrix[15] + matrix[12]); + left_plane.normalize(); + + return rad2deg(acos(abs(left_plane.normal.x))) + rad2deg(acos(abs(right_plane.normal.x))); + } +} + +void CameraMatrix::make_scale(const Vector3 &p_scale) { + + set_identity(); + matrix[0][0] = p_scale.x; + matrix[1][1] = p_scale.y; + matrix[2][2] = p_scale.z; +} + +void CameraMatrix::scale_translate_to_fit(const AABB &p_aabb) { + + Vector3 min = p_aabb.position; + Vector3 max = p_aabb.position + p_aabb.size; + + matrix[0][0] = 2 / (max.x - min.x); + matrix[1][0] = 0; + matrix[2][0] = 0; + matrix[3][0] = -(max.x + min.x) / (max.x - min.x); + + matrix[0][1] = 0; + matrix[1][1] = 2 / (max.y - min.y); + matrix[2][1] = 0; + matrix[3][1] = -(max.y + min.y) / (max.y - min.y); + + matrix[0][2] = 0; + matrix[1][2] = 0; + matrix[2][2] = 2 / (max.z - min.z); + matrix[3][2] = -(max.z + min.z) / (max.z - min.z); + + matrix[0][3] = 0; + matrix[1][3] = 0; + matrix[2][3] = 0; + matrix[3][3] = 1; +} + +CameraMatrix::operator Transform() const { + + Transform tr; + const real_t *m = &matrix[0][0]; + + tr.basis.elements[0][0] = m[0]; + tr.basis.elements[1][0] = m[1]; + tr.basis.elements[2][0] = m[2]; + + tr.basis.elements[0][1] = m[4]; + tr.basis.elements[1][1] = m[5]; + tr.basis.elements[2][1] = m[6]; + + tr.basis.elements[0][2] = m[8]; + tr.basis.elements[1][2] = m[9]; + tr.basis.elements[2][2] = m[10]; + + tr.origin.x = m[12]; + tr.origin.y = m[13]; + tr.origin.z = m[14]; + + return tr; +} + +CameraMatrix::CameraMatrix(const Transform &p_transform) { + + const Transform &tr = p_transform; + real_t *m = &matrix[0][0]; + + m[0] = tr.basis.elements[0][0]; + m[1] = tr.basis.elements[1][0]; + m[2] = tr.basis.elements[2][0]; + m[3] = 0.0; + m[4] = tr.basis.elements[0][1]; + m[5] = tr.basis.elements[1][1]; + m[6] = tr.basis.elements[2][1]; + m[7] = 0.0; + m[8] = tr.basis.elements[0][2]; + m[9] = tr.basis.elements[1][2]; + m[10] = tr.basis.elements[2][2]; + m[11] = 0.0; + m[12] = tr.origin.x; + m[13] = tr.origin.y; + m[14] = tr.origin.z; + m[15] = 1.0; +} + +CameraMatrix::~CameraMatrix() { +} diff --git a/src/core/RID.cpp b/src/core/RID.cpp index 5391f6e..5854806 100644 --- a/src/core/RID.cpp +++ b/src/core/RID.cpp @@ -14,6 +14,10 @@ RID::RID(Object *p) { godot::api->godot_rid_new_with_resource(&_godot_rid, (const godot_object *)p); } +godot_rid RID::_get_godot_rid() const { + return _godot_rid; +} + int32_t RID::get_id() const { return godot::api->godot_rid_get_id(&_godot_rid); }