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| /**
Copyright 2016 Google Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS-IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// This is not a unit test - it uses OpenGL to render an ion scene graph in a
// window.
#include "ion/demos/demobase.h"
#include "ion/gfx/graphicsmanager.h"
#include "ion/gfx/node.h"
#include "ion/gfx/renderer.h"
#include "ion/gfx/shaderinputregistry.h"
#include "ion/gfx/shape.h"
#include "ion/gfx/statetable.h"
#include "ion/gfx/uniform.h"
#include "ion/gfxutils/shapeutils.h"
#include "ion/math/matrix.h"
#include "ion/math/range.h"
#include "ion/math/vector.h"
using ion::math::Point2i;
using ion::math::Point3f;
using ion::math::Range2i;
using ion::math::Vector2i;
using ion::math::Vector4f;
using ion::math::Matrix4f;
namespace {
//-----------------------------------------------------------------------------
//
// Scene graph construction.
//
//-----------------------------------------------------------------------------
static const ion::gfx::NodePtr BuildRectangle(const Point3f& center,
const Vector4f& color) {
const ion::gfx::ShaderInputRegistryPtr& global_reg =
ion::gfx::ShaderInputRegistry::GetGlobalRegistry();
ion::gfx::NodePtr node(new ion::gfx::Node);
node->AddUniform(global_reg->Create<ion::gfx::Uniform>("uBaseColor", color));
ion::gfxutils::RectangleSpec rect_spec;
rect_spec.vertex_type = ion::gfxutils::ShapeSpec::kPosition;
rect_spec.translation = center;
node->AddShape(ion::gfxutils::BuildRectangleShape(rect_spec));
return node;
}
static const ion::gfx::NodePtr BuildGraph(int width, int height) {
const ion::gfx::ShaderInputRegistryPtr& global_reg =
ion::gfx::ShaderInputRegistry::GetGlobalRegistry();
const Matrix4f proj(1.515f, 0.0f, 0.0f, 0.0f,
0.0f, 1.732f, 0.0f, 0.0f,
0.0f, 0.0f, -1.905f, -13.798f,
0.0f, 0.0f, -1.0f, 0.0f);
const Matrix4f view(1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, -5.0f,
0.0f, 0.0f, 0.0f, 1.0f);
ion::gfx::NodePtr root(new ion::gfx::Node);
root->AddUniform(global_reg->Create<ion::gfx::Uniform>("uProjectionMatrix",
proj));
root->AddUniform(global_reg->Create<ion::gfx::Uniform>("uModelviewMatrix",
view));
// Set up global state.
ion::gfx::StateTablePtr state_table(new ion::gfx::StateTable(width, height));
state_table->SetViewport(
Range2i::BuildWithSize(Point2i(0, 0), Vector2i(width, height)));
state_table->SetClearColor(Vector4f(0.3f, 0.3f, 0.5f, 1.0f));
state_table->SetClearDepthValue(1.f);
state_table->Enable(ion::gfx::StateTable::kDepthTest, true);
state_table->Enable(ion::gfx::StateTable::kCullFace, true);
root->SetStateTable(state_table);
// Yellow rect on left.
root->AddChild(BuildRectangle(Point3f(-0.6f, 0.0f, 0.0f),
Vector4f(0.8f, 0.8f, 0.2f, 1.0f)));
// Red rect on right.
root->AddChild(BuildRectangle(Point3f(0.6f, 0.0f, 0.0f),
Vector4f(0.9f, 0.3f, 0.2f, 1.0f)));
return root;
}
} // anonymous namespace
//-----------------------------------------------------------------------------
//
// IonSimpleDraw class.
//
//-----------------------------------------------------------------------------
class IonSimpleDraw : public DemoBase {
public:
IonSimpleDraw(int width, int height)
: width_(width),
height_(height) {
graphics_manager_.Reset(new ion::gfx::GraphicsManager);
renderer_.Reset(new ion::gfx::Renderer(graphics_manager_));
root_ = BuildGraph(width, height);
}
~IonSimpleDraw() override {}
void Resize(int width, int height) override {
DCHECK(root_->GetStateTable().Get());
root_->GetStateTable()->SetViewport(
Range2i::BuildWithSize(Point2i(0, 0), Vector2i(width, height)));
width_ = width;
height_ = height;
}
void Render() override {
renderer_->DrawScene(root_);
}
void Update() override {}
void Keyboard(int key, int x, int y, bool is_press) override {}
void ProcessMotion(float x, float y, bool is_press) override {}
void ProcessScale(float scale) override {}
std::string GetDemoClassName() const override { return "IonSimpleDraw"; }
private:
ion::gfx::GraphicsManagerPtr graphics_manager_;
ion::gfx::RendererPtr renderer_;
ion::gfx::NodePtr root_;
ion::gfx::NodePtr plane_particles_;
int width_;
int height_;
};
DemoBase* CreateDemo(int w, int h) {
return new IonSimpleDraw(w, h);
} |
Ion est un ensemble d'outils pour la création d'applications et spécifiquement d'applications graphiques. L'ensemble se veut léger, robuste et multiplateforme. Grâce à Ion, vous pouvez produire des applications pour PC (Windows, Linux, Mac), pour mobiles, pour le Web ou encore pour l'embarqué.
L'avez-vous testé ? Qu'en pensez-vous ?
.
Envoyé par cuicui78
