From be81b33e2bb047adf06c1de961776fd8fb149bfe Mon Sep 17 00:00:00 2001 From: Aaron Franke Date: Sun, 14 Aug 2022 14:10:08 -0500 Subject: [PATCH] GLTF: Fix orthographic cameras, internally store data in GLTF's format --- modules/gltf/doc_classes/GLTFCamera.xml | 13 +++- modules/gltf/gltf_document.cpp | 87 ++++++++++++------------- modules/gltf/structures/gltf_camera.cpp | 15 +++-- modules/gltf/structures/gltf_camera.h | 27 +++++--- 4 files changed, 80 insertions(+), 62 deletions(-) diff --git a/modules/gltf/doc_classes/GLTFCamera.xml b/modules/gltf/doc_classes/GLTFCamera.xml index 9b9eff61413..b90abd105db 100644 --- a/modules/gltf/doc_classes/GLTFCamera.xml +++ b/modules/gltf/doc_classes/GLTFCamera.xml @@ -1,19 +1,30 @@ + Represents a GLTF camera. + Represents a camera as defined by the base GLTF spec. + https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#reference-camera + https://github.com/KhronosGroup/glTF-Tutorials/blob/master/gltfTutorial/gltfTutorial_015_SimpleCameras.md + The distance to the far culling boundary for this camera relative to its local Z axis, in meters. This maps to GLTF's [code]zfar[/code] property. + The distance to the near culling boundary for this camera relative to its local Z axis, in meters. This maps to GLTF's [code]znear[/code] property. - + + The FOV of the camera. This class and GLTF define the camera FOV in radians, while Godot uses degrees. This maps to GLTF's [code]yfov[/code] property. This value is only used for perspective cameras, when [member perspective] is true. + Whether or not the camera is in perspective mode. If false, the camera is in orthographic/orthogonal mode. This maps to GLTF's camera [code]type[/code] property. See [member Camera3D.projection] and the GLTF spec for more information. + + + The size of the camera. This class and GLTF define the camera size magnitude as a radius in meters, while Godot defines it as a diameter in meters. This maps to GLTF's [code]ymag[/code] property. This value is only used for orthographic/orthogonal cameras, when [member perspective] is false. diff --git a/modules/gltf/gltf_document.cpp b/modules/gltf/gltf_document.cpp index d102970932f..0f6b6598acd 100644 --- a/modules/gltf/gltf_document.cpp +++ b/modules/gltf/gltf_document.cpp @@ -50,7 +50,6 @@ #include "core/version.h" #include "drivers/png/png_driver_common.h" #include "scene/2d/node_2d.h" -#include "scene/3d/camera_3d.h" #include "scene/3d/mesh_instance_3d.h" #include "scene/3d/multimesh_instance_3d.h" #include "scene/3d/node_3d.h" @@ -4582,22 +4581,21 @@ Error GLTFDocument::_serialize_cameras(Ref state) { Ref camera = state->cameras[i]; - if (camera->get_perspective() == false) { - Dictionary og; - og["ymag"] = Math::deg2rad(camera->get_fov_size()); - og["xmag"] = Math::deg2rad(camera->get_fov_size()); - og["zfar"] = camera->get_depth_far(); - og["znear"] = camera->get_depth_near(); - d["orthographic"] = og; - d["type"] = "orthographic"; - } else if (camera->get_perspective()) { - Dictionary ppt; - // GLTF spec is in radians, Godot's camera is in degrees. - ppt["yfov"] = Math::deg2rad(camera->get_fov_size()); - ppt["zfar"] = camera->get_depth_far(); - ppt["znear"] = camera->get_depth_near(); - d["perspective"] = ppt; + if (camera->get_perspective()) { + Dictionary persp; + persp["yfov"] = camera->get_fov(); + persp["zfar"] = camera->get_depth_far(); + persp["znear"] = camera->get_depth_near(); + d["perspective"] = persp; d["type"] = "perspective"; + } else { + Dictionary ortho; + ortho["ymag"] = camera->get_size_mag(); + ortho["xmag"] = camera->get_size_mag(); + ortho["zfar"] = camera->get_depth_far(); + ortho["znear"] = camera->get_depth_near(); + d["orthographic"] = ortho; + d["type"] = "orthographic"; } cameras[i] = d; } @@ -4680,27 +4678,23 @@ Error GLTFDocument::_parse_cameras(Ref state) { camera.instantiate(); ERR_FAIL_COND_V(!d.has("type"), ERR_PARSE_ERROR); const String &type = d["type"]; - if (type == "orthographic") { - camera->set_perspective(false); - if (d.has("orthographic")) { - const Dictionary &og = d["orthographic"]; - // GLTF spec is in radians, Godot's camera is in degrees. - camera->set_fov_size(Math::rad2deg(real_t(og["ymag"]))); - camera->set_depth_far(og["zfar"]); - camera->set_depth_near(og["znear"]); - } else { - camera->set_fov_size(10); - } - } else if (type == "perspective") { + if (type == "perspective") { camera->set_perspective(true); if (d.has("perspective")) { - const Dictionary &ppt = d["perspective"]; - // GLTF spec is in radians, Godot's camera is in degrees. - camera->set_fov_size(Math::rad2deg(real_t(ppt["yfov"]))); - camera->set_depth_far(ppt["zfar"]); - camera->set_depth_near(ppt["znear"]); - } else { - camera->set_fov_size(10); + const Dictionary &persp = d["perspective"]; + camera->set_fov(persp["yfov"]); + if (persp.has("zfar")) { + camera->set_depth_far(persp["zfar"]); + } + camera->set_depth_near(persp["znear"]); + } + } else if (type == "orthographic") { + camera->set_perspective(false); + if (d.has("orthographic")) { + const Dictionary &ortho = d["orthographic"]; + camera->set_size_mag(ortho["ymag"]); + camera->set_depth_far(ortho["zfar"]); + camera->set_depth_near(ortho["znear"]); } } else { ERR_FAIL_V_MSG(ERR_PARSE_ERROR, "Camera3D should be in 'orthographic' or 'perspective'"); @@ -5204,12 +5198,13 @@ Camera3D *GLTFDocument::_generate_camera(Ref state, const GLTFNodeInd print_verbose("glTF: Creating camera for: " + gltf_node->get_name()); Ref c = state->cameras[gltf_node->camera]; - if (c->get_perspective()) { - camera->set_perspective(c->get_fov_size(), c->get_depth_near(), c->get_depth_far()); - } else { - camera->set_orthogonal(c->get_fov_size(), c->get_depth_near(), c->get_depth_far()); - } - + camera->set_projection(c->get_perspective() ? Camera3D::PROJECTION_PERSPECTIVE : Camera3D::PROJECTION_ORTHOGONAL); + // GLTF spec (yfov) is in radians, Godot's camera (fov) is in degrees. + camera->set_fov(Math::rad2deg(c->get_fov())); + // GLTF spec (xmag and ymag) is a radius in meters, Godot's camera (size) is a diameter in meters. + camera->set_size(c->get_size_mag() * 2.0f); + camera->set_near(c->get_depth_near()); + camera->set_far(c->get_depth_far()); return camera; } @@ -5218,11 +5213,11 @@ GLTFCameraIndex GLTFDocument::_convert_camera(Ref state, Camera3D *p_ Ref c; c.instantiate(); - - if (p_camera->get_projection() == Camera3D::ProjectionType::PROJECTION_PERSPECTIVE) { - c->set_perspective(true); - } - c->set_fov_size(p_camera->get_fov()); + c->set_perspective(p_camera->get_projection() == Camera3D::ProjectionType::PROJECTION_PERSPECTIVE); + // GLTF spec (yfov) is in radians, Godot's camera (fov) is in degrees. + c->set_fov(Math::deg2rad(p_camera->get_fov())); + // GLTF spec (xmag and ymag) is a radius in meters, Godot's camera (size) is a diameter in meters. + c->set_size_mag(p_camera->get_size() * 0.5f); c->set_depth_far(p_camera->get_far()); c->set_depth_near(p_camera->get_near()); GLTFCameraIndex camera_index = state->cameras.size(); diff --git a/modules/gltf/structures/gltf_camera.cpp b/modules/gltf/structures/gltf_camera.cpp index f3ea6a1c4cc..c492913ea72 100644 --- a/modules/gltf/structures/gltf_camera.cpp +++ b/modules/gltf/structures/gltf_camera.cpp @@ -33,15 +33,18 @@ void GLTFCamera::_bind_methods() { ClassDB::bind_method(D_METHOD("get_perspective"), &GLTFCamera::get_perspective); ClassDB::bind_method(D_METHOD("set_perspective", "perspective"), &GLTFCamera::set_perspective); - ClassDB::bind_method(D_METHOD("get_fov_size"), &GLTFCamera::get_fov_size); - ClassDB::bind_method(D_METHOD("set_fov_size", "fov_size"), &GLTFCamera::set_fov_size); + ClassDB::bind_method(D_METHOD("get_fov"), &GLTFCamera::get_fov); + ClassDB::bind_method(D_METHOD("set_fov", "fov"), &GLTFCamera::set_fov); + ClassDB::bind_method(D_METHOD("get_size_mag"), &GLTFCamera::get_size_mag); + ClassDB::bind_method(D_METHOD("set_size_mag", "size_mag"), &GLTFCamera::set_size_mag); ClassDB::bind_method(D_METHOD("get_depth_far"), &GLTFCamera::get_depth_far); ClassDB::bind_method(D_METHOD("set_depth_far", "zdepth_far"), &GLTFCamera::set_depth_far); ClassDB::bind_method(D_METHOD("get_depth_near"), &GLTFCamera::get_depth_near); ClassDB::bind_method(D_METHOD("set_depth_near", "zdepth_near"), &GLTFCamera::set_depth_near); - ADD_PROPERTY(PropertyInfo(Variant::BOOL, "perspective"), "set_perspective", "get_perspective"); // bool - ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "fov_size"), "set_fov_size", "get_fov_size"); // float - ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "depth_far"), "set_depth_far", "get_depth_far"); // float - ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "depth_near"), "set_depth_near", "get_depth_near"); // float + ADD_PROPERTY(PropertyInfo(Variant::BOOL, "perspective"), "set_perspective", "get_perspective"); + ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "fov"), "set_fov", "get_fov"); + ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "size_mag"), "set_size_mag", "get_size_mag"); + ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "depth_far"), "set_depth_far", "get_depth_far"); + ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "depth_near"), "set_depth_near", "get_depth_near"); } diff --git a/modules/gltf/structures/gltf_camera.h b/modules/gltf/structures/gltf_camera.h index b7df7418253..714ec21693e 100644 --- a/modules/gltf/structures/gltf_camera.h +++ b/modules/gltf/structures/gltf_camera.h @@ -32,15 +32,22 @@ #define GLTF_CAMERA_H #include "core/io/resource.h" +#include "scene/3d/camera_3d.h" + +// Reference and test file: +// https://github.com/KhronosGroup/glTF-Tutorials/blob/master/gltfTutorial/gltfTutorial_015_SimpleCameras.md class GLTFCamera : public Resource { GDCLASS(GLTFCamera, Resource); private: + // GLTF has no default camera values, they should always be specified in + // the GLTF file. Here we default to Godot's default camera settings. bool perspective = true; - float fov_size = 75.0; - float depth_far = 4000.0; - float depth_near = 0.05; + real_t fov = Math::deg2rad(75.0); + real_t size_mag = 0.5; + real_t depth_far = 4000.0; + real_t depth_near = 0.05; protected: static void _bind_methods(); @@ -48,12 +55,14 @@ protected: public: bool get_perspective() const { return perspective; } void set_perspective(bool p_val) { perspective = p_val; } - float get_fov_size() const { return fov_size; } - void set_fov_size(float p_val) { fov_size = p_val; } - float get_depth_far() const { return depth_far; } - void set_depth_far(float p_val) { depth_far = p_val; } - float get_depth_near() const { return depth_near; } - void set_depth_near(float p_val) { depth_near = p_val; } + real_t get_fov() const { return fov; } + void set_fov(real_t p_val) { fov = p_val; } + real_t get_size_mag() const { return size_mag; } + void set_size_mag(real_t p_val) { size_mag = p_val; } + real_t get_depth_far() const { return depth_far; } + void set_depth_far(real_t p_val) { depth_far = p_val; } + real_t get_depth_near() const { return depth_near; } + void set_depth_near(real_t p_val) { depth_near = p_val; } }; #endif // GLTF_CAMERA_H