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[Editor] Added a fully functional transformation gizmo (position, rot…
…ation, scale)
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| /* | ||
| Copyright(c) 2016-2022 Panos Karabelas | ||
| 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. | ||
| */ | ||
|
|
||
| #pragma once | ||
|
|
||
| //= INCLUDES =========================== | ||
| #include "../Source/ImGuizmo/ImGuizmo.h" | ||
| #include "../Source/imgui.h" | ||
| #include "World/Components/Transform.h" | ||
| #include "World/Entity.h" | ||
| #include "Context.h" | ||
| #include "Rendering/Renderer.h" | ||
| #include "Input/Input.h" | ||
| //====================================== | ||
|
|
||
| namespace ImGui::TransformGizmo | ||
| { | ||
| static void apply_style() | ||
| { | ||
| ImGuizmo::Style& style = ImGuizmo::GetStyle(); | ||
| style.TranslationLineThickness = 6.0f; | ||
| style.TranslationLineArrowSize = 10.0f; | ||
| style.RotationLineThickness = 4.0f; | ||
| style.RotationOuterLineThickness = 5.0f; | ||
| style.ScaleLineThickness = 6.0f; | ||
| style.ScaleLineCircleSize = 6.0f; | ||
| style.HatchedAxisLineThickness = 6.0f; | ||
| style.CenterCircleSize = 6.0f; | ||
| } | ||
|
|
||
| static void tick(Spartan::Context* context) | ||
| { | ||
| std::shared_ptr<Spartan::Camera> camera = context->GetSystem<Spartan::Renderer>()->GetCamera(); | ||
| if (!camera) | ||
| return; | ||
|
|
||
| // Get selected entity | ||
| std::shared_ptr<Spartan::Entity> entity = camera->GetSelectedEntity(); | ||
|
|
||
| // Enable/disable gizmo | ||
| ImGuizmo::Enable(entity != nullptr); | ||
| if (!entity) | ||
| return; | ||
|
|
||
| // Switch between position, rotation and scale operations, with W, E and R respectively | ||
| static ImGuizmo::OPERATION transform_operation = ImGuizmo::TRANSLATE; | ||
| if (!camera->IsControledInFirstPerson()) | ||
| { | ||
| if (context->GetSystem<Spartan::Input>()->GetKeyDown(Spartan::KeyCode::W)) | ||
| { | ||
| transform_operation = ImGuizmo::TRANSLATE; | ||
| } | ||
| else if (context->GetSystem<Spartan::Input>()->GetKeyDown(Spartan::KeyCode::E)) | ||
| { | ||
| transform_operation = ImGuizmo::ROTATE; | ||
| } | ||
| else if (context->GetSystem<Spartan::Input>()->GetKeyDown(Spartan::KeyCode::R)) | ||
| { | ||
| transform_operation = ImGuizmo::SCALE; | ||
| } | ||
| } | ||
|
|
||
| ImGuizmo::MODE transform_space = ImGuizmo::WORLD; | ||
|
|
||
| // Get some data | ||
| const Spartan::Math::Matrix& matrix_projection = camera->GetProjectionMatrix().Transposed(); | ||
| const Spartan::Math::Matrix& matrix_view = camera->GetViewMatrix().Transposed(); | ||
| Spartan::Transform* transform = entity->GetComponent<Spartan::Transform>(); | ||
|
|
||
| // Begin | ||
| const bool is_orthographic = false; | ||
| ImGuizmo::SetOrthographic(is_orthographic); | ||
| ImGuizmo::BeginFrame(); | ||
|
|
||
| // Map transform to ImGuizmo | ||
| float matrix_delta[16]; | ||
| float translation[3] = { transform->GetPosition().x, transform->GetPosition().y, transform->GetPosition().z }; | ||
| float rotation[3] = { transform->GetRotation().ToEulerAngles().x, transform->GetRotation().ToEulerAngles().y, transform->GetRotation().ToEulerAngles().z }; | ||
| float scale[3] = { transform->GetScale().x, transform->GetScale().y, transform->GetScale().z }; | ||
| ImGuizmo::RecomposeMatrixFromComponents(&translation[0], rotation, scale, &matrix_delta[0]); | ||
|
|
||
| // Set viewport rectangle | ||
| ImGuizmo::SetDrawlist(); | ||
| ImGuizmo::SetRect(ImGui::GetWindowPos().x, ImGui::GetWindowPos().y, ImGui::GetWindowWidth(), ImGui::GetWindowHeight()); | ||
| ImGuizmo::Manipulate(&matrix_view.m00, &matrix_projection.m00, transform_operation, transform_space, &matrix_delta[0], 0, 0); | ||
|
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| // Map ImGuizmo to transform | ||
| if (ImGuizmo::IsUsing()) | ||
| { | ||
| ImGuizmo::DecomposeMatrixToComponents(&matrix_delta[0], translation, rotation, scale); | ||
|
|
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| transform->SetPosition(Spartan::Math::Vector3(translation[0], translation[1], translation[2])); | ||
| transform->SetRotation(Spartan::Math::Quaternion::FromEulerAngles(rotation[0], rotation[1], rotation[2])); | ||
| transform->SetScale(Spartan::Math::Vector3(scale[0], scale[1], scale[2])); | ||
| } | ||
| } | ||
|
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||
| static bool allow_picking() | ||
| { | ||
| return !ImGuizmo::IsOver() && !ImGuizmo::IsUsing(); | ||
| } | ||
| } |
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