Urho3D/Source/Samples/51_Urho2DStretchableSprite/Urho2DStretchableSprite.cpp
2021-07-17 16:43:46 +00:00

242 lines
7.9 KiB
C++

//
// Copyright (c) 2008-2021 the Urho3D project.
//
// 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 <Urho3D/Core/CoreEvents.h>
#include <Urho3D/Engine/Engine.h>
#include <Urho3D/Graphics/Camera.h>
#include <Urho3D/Graphics/Graphics.h>
#include <Urho3D/Graphics/Octree.h>
#include <Urho3D/Graphics/Renderer.h>
#include <Urho3D/Input/Input.h>
#include <Urho3D/Resource/ResourceCache.h>
#include <Urho3D/Scene/Scene.h>
#include <Urho3D/UI/Font.h>
#include <Urho3D/UI/Text.h>
#include <Urho3D/Urho2D/Sprite2D.h>
#include <Urho3D/Urho2D/StaticSprite2D.h>
#include <Urho3D/Urho2D/StretchableSprite2D.h>
#include "Urho2DStretchableSprite.h"
#include <Urho3D/DebugNew.h>
URHO3D_DEFINE_APPLICATION_MAIN(Urho2DStretchableSprite)
Urho2DStretchableSprite::Urho2DStretchableSprite(Context* context) :
Sample(context)
{
}
void Urho2DStretchableSprite::Start()
{
// Execute base class startup
Sample::Start();
// Create the scene content
CreateScene();
// Create the UI content
CreateInstructions();
// Setup the viewport for displaying the scene
SetupViewport();
// Hook up to the frame update events
SubscribeToEvents();
// Set the mouse mode to use in the sample
Sample::InitMouseMode(MM_FREE);
}
void Urho2DStretchableSprite::CreateScene()
{
scene_ = new Scene(context_);
scene_->CreateComponent<Octree>();
// Create camera node
cameraNode_ = scene_->CreateChild("Camera");
// Set camera's position
cameraNode_->SetPosition(Vector3(0.0f, 0.0f, -10.0f));
auto* camera = cameraNode_->CreateComponent<Camera>();
camera->SetOrthographic(true);
auto* graphics = GetSubsystem<Graphics>();
camera->SetOrthoSize((float)graphics->GetHeight() * PIXEL_SIZE);
refSpriteNode_ = scene_->CreateChild("regular sprite");
stretchSpriteNode_ = scene_->CreateChild("stretchable sprite");
auto* cache = GetSubsystem<ResourceCache>();
auto* sprite = cache->GetResource<Sprite2D>("Urho2D/Stretchable.png");
if (sprite)
{
refSpriteNode_->CreateComponent<StaticSprite2D>()->SetSprite(sprite);
auto stretchSprite = stretchSpriteNode_->CreateComponent<StretchableSprite2D>();
stretchSprite->SetSprite(sprite);
stretchSprite->SetBorder({25, 25, 25, 25});
refSpriteNode_->Translate2D(Vector2{-2.0f, 0.0f});
stretchSpriteNode_->Translate2D(Vector2{2.0f, 0.0f});
}
}
void Urho2DStretchableSprite::CreateInstructions()
{
auto* cache = GetSubsystem<ResourceCache>();
auto* ui = GetSubsystem<UI>();
// Construct new Text object, set string to display and font to use
auto* instructionText = ui->GetRoot()->CreateChild<Text>();
instructionText->SetText(
"Use WASD keys to transform, Tab key to cycle through\n"
"Scale, Rotate, and Translate transform modes. In Rotate\n"
"mode, combine A/D keys with Ctrl key to rotate about\n"
"the Z axis");
instructionText->SetFont(cache->GetResource<Font>("Fonts/Anonymous Pro.ttf"), 12);
// Position the text relative to the screen center
instructionText->SetHorizontalAlignment(HA_CENTER);
instructionText->SetVerticalAlignment(VA_CENTER);
instructionText->SetPosition(0, ui->GetRoot()->GetHeight() / 4);
}
void Urho2DStretchableSprite::SetupViewport()
{
auto* renderer = GetSubsystem<Renderer>();
// Set up a viewport to the Renderer subsystem so that the 3D scene can be seen
SharedPtr<Viewport> viewport(new Viewport(context_, scene_, cameraNode_->GetComponent<Camera>()));
renderer->SetViewport(0, viewport);
}
void Urho2DStretchableSprite::SubscribeToEvents()
{
SubscribeToEvent(E_KEYUP, URHO3D_HANDLER(Urho2DStretchableSprite, OnKeyUp));
// Subscribe HandleUpdate() function for processing update events
SubscribeToEvent(E_UPDATE, URHO3D_HANDLER(Urho2DStretchableSprite, HandleUpdate));
// Unsubscribe the SceneUpdate event from base class to prevent camera pitch and yaw in 2D sample
UnsubscribeFromEvent(E_SCENEUPDATE);
}
void Urho2DStretchableSprite::HandleUpdate(StringHash /*eventType*/, VariantMap& eventData)
{
using namespace Update;
// Take the frame time step, which is stored as a float
float timeStep = eventData[P_TIMESTEP].GetFloat();
switch (selectTransform_)
{
case 0: ScaleSprites(timeStep);
break;
case 1: RotateSprites(timeStep);
break;
case 2: TranslateSprites(timeStep);
break;
default: URHO3D_LOGERRORF("bad transform selection: %d", selectTransform_);
}
}
void Urho2DStretchableSprite::OnKeyUp(StringHash /*eventType*/, VariantMap& eventData)
{
using namespace KeyUp;
const auto key = eventData[P_KEY].GetInt();
if (key == KEY_TAB)
{
++selectTransform_;
selectTransform_ %= 3;
}
else if (key == KEY_ESCAPE)
engine_->Exit();
}
void Urho2DStretchableSprite::TranslateSprites(float timeStep)
{
static constexpr auto speed = 1.0f;
const auto input = GetSubsystem<Input>();
const auto left = input->GetKeyDown(KEY_A),
right = input->GetKeyDown(KEY_D),
up = input->GetKeyDown(KEY_W),
down = input->GetKeyDown(KEY_S);
if (left || right || up || down)
{
const auto quantum = timeStep * speed;
const auto translate = Vector2{(left ? -quantum : 0.0f) + (right ? quantum : 0.0f),
(down ? -quantum : 0.0f) + (up ? quantum : 0.0f)};
refSpriteNode_->Translate2D(translate);
stretchSpriteNode_->Translate2D(translate);
}
}
void Urho2DStretchableSprite::RotateSprites(float timeStep)
{
static constexpr auto speed = 45.0f;
const auto input = GetSubsystem<Input>();
const auto left = input->GetKeyDown(KEY_A),
right = input->GetKeyDown(KEY_D),
up = input->GetKeyDown(KEY_W),
down = input->GetKeyDown(KEY_S),
ctrl = input->GetKeyDown(KEY_CTRL);
if (left || right || up || down)
{
const auto quantum = timeStep * speed;
const auto xrot = (up ? -quantum : 0.0f) + (down ? quantum : 0.0f);
const auto rot2 = (left ? -quantum : 0.0f) + (right ? quantum : 0.0f);
const auto totalRot = Quaternion{xrot, ctrl ? 0.0f : rot2, ctrl ? rot2 : 0.0f};
refSpriteNode_->Rotate(totalRot);
stretchSpriteNode_->Rotate(totalRot);
}
}
void Urho2DStretchableSprite::ScaleSprites(float timeStep)
{
static constexpr auto speed = 0.5f;
const auto input = GetSubsystem<Input>();
const auto left = input->GetKeyDown(KEY_A),
right = input->GetKeyDown(KEY_D),
up = input->GetKeyDown(KEY_W),
down = input->GetKeyDown(KEY_S);
if (left || right || up || down)
{
const auto quantum = timeStep * speed;
const auto scale = Vector2{1.0f + (right ? quantum : left ? -quantum : 0.0f),
1.0f + (up ? quantum : down ? -quantum : 0.0f)};
refSpriteNode_->Scale2D(scale);
stretchSpriteNode_->Scale2D(scale);
}
}