Flutter Impeller
scene_unittests.cc
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include <cmath>
6 #include <memory>
7 #include <vector>
8 
9 #include "flutter/fml/mapping.h"
10 #include "flutter/testing/testing.h"
11 #include "impeller/core/formats.h"
21 #include "impeller/scene/camera.h"
23 #include "impeller/scene/importer/scene_flatbuffers.h"
25 #include "impeller/scene/mesh.h"
26 #include "impeller/scene/scene.h"
27 #include "third_party/flatbuffers/include/flatbuffers/verifier.h"
28 #include "third_party/imgui/imgui.h"
29 
30 namespace impeller {
31 namespace scene {
32 namespace testing {
33 
36 
37 TEST_P(SceneTest, CuboidUnlit) {
38  auto scene_context = std::make_shared<SceneContext>(GetContext());
39 
40  Renderer::RenderCallback callback = [&](RenderTarget& render_target) {
41  auto allocator = GetContext()->GetResourceAllocator();
42  auto scene = Scene(scene_context);
43 
44  {
45  Mesh mesh;
46 
47  auto material = Material::MakeUnlit();
48  material->SetColor(Color::Red());
49 
50  Vector3 size(1, 1, 0);
51  mesh.AddPrimitive({Geometry::MakeCuboid(size), std::move(material)});
52 
53  Node& root = scene.GetRoot();
55  root.SetMesh(std::move(mesh));
56  }
57 
58  // Face towards the +Z direction (+X right, +Y up).
59  auto camera = Camera::MakePerspective(
60  /* fov */ Radians(kPiOver4),
61  /* position */ {2, 2, -5})
62  .LookAt(
63  /* target */ Vector3(),
64  /* up */ {0, 1, 0});
65 
66  scene.Render(render_target, camera);
67  return true;
68  };
69 
70  OpenPlaygroundHere(callback);
71 }
72 
73 TEST_P(SceneTest, FlutterLogo) {
74  auto allocator = GetContext()->GetResourceAllocator();
75 
76  auto mapping =
77  flutter::testing::OpenFixtureAsMapping("flutter_logo_baked.glb.ipscene");
78  ASSERT_NE(mapping, nullptr);
79 
80  flatbuffers::Verifier verifier(mapping->GetMapping(), mapping->GetSize());
81  ASSERT_TRUE(fb::VerifySceneBuffer(verifier));
82 
83  std::shared_ptr<Node> gltf_scene =
84  Node::MakeFromFlatbuffer(*mapping, *allocator);
85  ASSERT_NE(gltf_scene, nullptr);
86  ASSERT_EQ(gltf_scene->GetChildren().size(), 1u);
87  ASSERT_EQ(gltf_scene->GetChildren()[0]->GetMesh().GetPrimitives().size(), 1u);
88 
89  auto scene_context = std::make_shared<SceneContext>(GetContext());
90  auto scene = Scene(scene_context);
91  scene.GetRoot().AddChild(std::move(gltf_scene));
92  scene.GetRoot().SetLocalTransform(Matrix::MakeScale({3, 3, 3}));
93 
94  Renderer::RenderCallback callback = [&](RenderTarget& render_target) {
95  Quaternion rotation({0, 1, 0}, -GetSecondsElapsed() * 0.5);
96  Vector3 start_position(-1, -1.5, -5);
97 
98  // Face towards the +Z direction (+X right, +Y up).
99  auto camera = Camera::MakePerspective(
100  /* fov */ Degrees(60),
101  /* position */ rotation * start_position)
102  .LookAt(
103  /* target */ Vector3(),
104  /* up */ {0, 1, 0});
105 
106  scene.Render(render_target, camera);
107  return true;
108  };
109 
110  OpenPlaygroundHere(callback);
111 }
112 
113 TEST_P(SceneTest, TwoTriangles) {
114  if (GetBackend() == PlaygroundBackend::kVulkan) {
115  GTEST_SKIP_("Temporarily disabled.");
116  }
117  auto allocator = GetContext()->GetResourceAllocator();
118 
119  auto mapping =
120  flutter::testing::OpenFixtureAsMapping("two_triangles.glb.ipscene");
121  ASSERT_NE(mapping, nullptr);
122 
123  std::shared_ptr<Node> gltf_scene =
124  Node::MakeFromFlatbuffer(*mapping, *allocator);
125  ASSERT_NE(gltf_scene, nullptr);
126 
127  auto animation = gltf_scene->FindAnimationByName("Metronome");
128  ASSERT_NE(animation, nullptr);
129 
130  AnimationClip* metronome_clip = gltf_scene->AddAnimation(animation);
131  ASSERT_NE(metronome_clip, nullptr);
132  metronome_clip->SetLoop(true);
133  metronome_clip->Play();
134 
135  auto scene_context = std::make_shared<SceneContext>(GetContext());
136  auto scene = Scene(scene_context);
137  scene.GetRoot().AddChild(std::move(gltf_scene));
138 
139  Renderer::RenderCallback callback = [&](RenderTarget& render_target) {
140  ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
141  {
142  static Scalar playback_time_scale = 1;
143  static Scalar weight = 1;
144  static bool loop = true;
145 
146  ImGui::SliderFloat("Playback time scale", &playback_time_scale, -5, 5);
147  ImGui::SliderFloat("Weight", &weight, -2, 2);
148  ImGui::Checkbox("Loop", &loop);
149  if (ImGui::Button("Play")) {
150  metronome_clip->Play();
151  }
152  if (ImGui::Button("Pause")) {
153  metronome_clip->Pause();
154  }
155  if (ImGui::Button("Stop")) {
156  metronome_clip->Stop();
157  }
158 
159  metronome_clip->SetPlaybackTimeScale(playback_time_scale);
160  metronome_clip->SetWeight(weight);
161  metronome_clip->SetLoop(loop);
162  }
163 
164  ImGui::End();
165  Node& node = *scene.GetRoot().GetChildren()[0];
167  Matrix::MakeRotation(0.02, {0, 1, 0, 0}));
168 
169  static ImVec2 mouse_pos_prev = ImGui::GetMousePos();
170  ImVec2 mouse_pos = ImGui::GetMousePos();
171  Vector2 mouse_diff =
172  Vector2(mouse_pos.x - mouse_pos_prev.x, mouse_pos.y - mouse_pos_prev.y);
173 
174  static Vector3 position(0, 1, -5);
175  static Vector3 cam_position = position;
176  auto strafe =
177  Vector3(ImGui::IsKeyDown(ImGuiKey_D) - ImGui::IsKeyDown(ImGuiKey_A),
178  ImGui::IsKeyDown(ImGuiKey_E) - ImGui::IsKeyDown(ImGuiKey_Q),
179  ImGui::IsKeyDown(ImGuiKey_W) - ImGui::IsKeyDown(ImGuiKey_S));
180  position += strafe * 0.5;
181  cam_position = cam_position.Lerp(position, 0.02);
182 
183  // Face towards the +Z direction (+X right, +Y up).
184  auto camera = Camera::MakePerspective(
185  /* fov */ Degrees(60),
186  /* position */ cam_position)
187  .LookAt(
188  /* target */ cam_position + Vector3(0, 0, 1),
189  /* up */ {0, 1, 0});
190 
191  scene.Render(render_target, camera);
192  return true;
193  };
194 
195  OpenPlaygroundHere(callback);
196 }
197 
199  auto allocator = GetContext()->GetResourceAllocator();
200 
201  auto mapping = flutter::testing::OpenFixtureAsMapping("dash.glb.ipscene");
202  if (!mapping) {
203  // TODO(bdero): Just skip this playground is the dash asset isn't found. I
204  // haven't checked it in because it's way too big right now,
205  // but this is still useful to keep around for debugging
206  // purposes.
207  return;
208  }
209  ASSERT_NE(mapping, nullptr);
210 
211  std::shared_ptr<Node> gltf_scene =
212  Node::MakeFromFlatbuffer(*mapping, *allocator);
213  ASSERT_NE(gltf_scene, nullptr);
214 
215  auto walk_anim = gltf_scene->FindAnimationByName("Walk");
216  ASSERT_NE(walk_anim, nullptr);
217 
218  AnimationClip* walk_clip = gltf_scene->AddAnimation(walk_anim);
219  ASSERT_NE(walk_clip, nullptr);
220  walk_clip->SetLoop(true);
221  walk_clip->Play();
222 
223  auto run_anim = gltf_scene->FindAnimationByName("Run");
224  ASSERT_NE(walk_anim, nullptr);
225 
226  AnimationClip* run_clip = gltf_scene->AddAnimation(run_anim);
227  ASSERT_NE(run_clip, nullptr);
228  run_clip->SetLoop(true);
229  run_clip->Play();
230 
231  auto scene_context = std::make_shared<SceneContext>(GetContext());
232  auto scene = Scene(scene_context);
233  scene.GetRoot().AddChild(std::move(gltf_scene));
234 
235  Renderer::RenderCallback callback = [&](RenderTarget& render_target) {
236  ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
237  {
238  static Scalar playback_time_scale = 1;
239  static Scalar walk = 0.5;
240  static Scalar run = 0.5;
241  static bool loop = true;
242 
243  ImGui::SliderFloat("Playback time scale", &playback_time_scale, -5, 5);
244  ImGui::SliderFloat("Walk weight", &walk, 0, 1);
245  ImGui::SliderFloat("Run weight", &run, 0, 1);
246  ImGui::Checkbox("Loop", &loop);
247  if (ImGui::Button("Play")) {
248  walk_clip->Play();
249  run_clip->Play();
250  }
251  if (ImGui::Button("Pause")) {
252  walk_clip->Pause();
253  run_clip->Pause();
254  }
255  if (ImGui::Button("Stop")) {
256  walk_clip->Stop();
257  run_clip->Stop();
258  }
259 
260  walk_clip->SetPlaybackTimeScale(playback_time_scale);
261  walk_clip->SetWeight(walk);
262  walk_clip->SetLoop(loop);
263 
264  run_clip->SetPlaybackTimeScale(playback_time_scale);
265  run_clip->SetWeight(run);
266  run_clip->SetLoop(loop);
267  }
268 
269  ImGui::End();
270  Node& node = *scene.GetRoot().GetChildren()[0];
272  Matrix::MakeRotation(0.02, {0, 1, 0, 0}));
273 
274  static ImVec2 mouse_pos_prev = ImGui::GetMousePos();
275  ImVec2 mouse_pos = ImGui::GetMousePos();
276  Vector2 mouse_diff =
277  Vector2(mouse_pos.x - mouse_pos_prev.x, mouse_pos.y - mouse_pos_prev.y);
278 
279  static Vector3 position(0, 1, -5);
280  static Vector3 cam_position = position;
281  auto strafe =
282  Vector3(ImGui::IsKeyDown(ImGuiKey_D) - ImGui::IsKeyDown(ImGuiKey_A),
283  ImGui::IsKeyDown(ImGuiKey_E) - ImGui::IsKeyDown(ImGuiKey_Q),
284  ImGui::IsKeyDown(ImGuiKey_W) - ImGui::IsKeyDown(ImGuiKey_S));
285  position += strafe * 0.5;
286  cam_position = cam_position.Lerp(position, 0.02);
287 
288  // Face towards the +Z direction (+X right, +Y up).
289  auto camera = Camera::MakePerspective(
290  /* fov */ Degrees(60),
291  /* position */ cam_position)
292  .LookAt(
293  /* target */ cam_position + Vector3(0, 0, 1),
294  /* up */ {0, 1, 0});
295 
296  scene.Render(render_target, camera);
297  return true;
298  };
299 
300  OpenPlaygroundHere(callback);
301 }
302 
303 } // namespace testing
304 } // namespace scene
305 } // namespace impeller
impeller::PlaygroundBackend::kVulkan
@ kVulkan
impeller::scene::Node::GetLocalTransform
Matrix GetLocalTransform() const
Definition: node.cc:282
impeller::Scalar
float Scalar
Definition: scalar.h:18
impeller::scene::Geometry::MakeCuboid
static std::shared_ptr< CuboidGeometry > MakeCuboid(Vector3 size)
Definition: geometry.cc:31
impeller::Color::Red
static constexpr Color Red()
Definition: color.h:264
impeller::scene::Mesh
Definition: mesh.h:21
impeller::scene::AnimationClip::SetPlaybackTimeScale
void SetPlaybackTimeScale(Scalar playback_speed)
Sets the animation playback speed. Negative values make the clip play in reverse.
Definition: animation_clip.cc:61
impeller::Renderer::RenderCallback
std::function< bool(RenderTarget &render_target)> RenderCallback
Definition: renderer.h:23
impeller::Matrix::MakeRotation
static Matrix MakeRotation(Quaternion q)
Definition: matrix.h:126
impeller::scene::AnimationClip::SetLoop
void SetLoop(bool looping)
Definition: animation_clip.cc:53
formats.h
impeller::Vector2
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Definition: point.h:320
quaternion.h
impeller::scene::AnimationClip::Play
void Play()
Definition: animation_clip.cc:36
playground.h
impeller::scene::Node::SetMesh
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Definition: node.cc:329
impeller::Matrix::MakeTranslation
static constexpr Matrix MakeTranslation(const Vector3 &t)
Definition: matrix.h:95
impeller::scene::AnimationClip
Definition: animation_clip.h:22
impeller::scene::Camera::MakePerspective
static Camera MakePerspective(Radians fov_y, Vector3 position)
Definition: camera.cc:10
impeller::scene::Node::GetChildren
std::vector< std::shared_ptr< Node > > & GetChildren()
Definition: node.cc:325
matrix.h
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Definition: quaternion.h:14
scene.h
animation_clip.h
material.h
impeller::scene::Camera::LookAt
Camera LookAt(Vector3 target, Vector3 up=Vector3(0, -1, 0)) const
Definition: camera.cc:17
impeller::scene::Mesh::AddPrimitive
void AddPrimitive(Primitive mesh_)
Definition: mesh.cc:21
impeller::Radians
Definition: scalar.h:38
impeller::scene::AnimationClip::SetWeight
void SetWeight(Scalar weight)
Definition: animation_clip.cc:69
impeller::RenderTarget
Definition: render_target.h:38
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Definition: animation_clip.cc:40
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impeller::scene::Material::MakeUnlit
static std::unique_ptr< UnlitMaterial > MakeUnlit()
Definition: material.cc:38
constants.h
impeller::TPoint< Scalar >
impeller::scene::testing::INSTANTIATE_PLAYGROUND_SUITE
INSTANTIATE_PLAYGROUND_SUITE(SceneTest)
impeller::scene::testing::TEST_P
TEST_P(SceneTest, CuboidUnlit)
Definition: scene_unittests.cc:37
impeller::scene::Node
Definition: node.h:30
impeller::Degrees
Definition: scalar.h:46
color.h
geometry.h
impeller::scene::Scene
Definition: scene.h:21
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Definition: playground_test.h:23
impeller::scene::Node::SetLocalTransform
void SetLocalTransform(Matrix transform)
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impeller::scene::Node::MakeFromFlatbuffer
static std::shared_ptr< Node > MakeFromFlatbuffer(const fml::Mapping &ipscene_mapping, Allocator &allocator)
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static constexpr Matrix MakeScale(const Vector3 &s)
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constexpr float kPiOver4
Definition: constants.h:35
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constexpr Vector3 Lerp(const Vector3 &v, Scalar t) const
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impeller::scene::AnimationClip::Stop
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Definition: animation_clip.cc:44