Urho3D/Source/Samples/36_Urho2DTileMap/Urho2DTileMap.cpp
2020-01-05 06:21:40 +00:00

231 lines
8.3 KiB
C++

//
// Copyright (c) 2008-2020 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/Graphics/Camera.h>
#include <Urho3D/Engine/Engine.h>
#include <Urho3D/UI/Font.h>
#include <Urho3D/Graphics/Graphics.h>
#include <Urho3D/Input/Input.h>
#include <Urho3D/Graphics/Octree.h>
#include <Urho3D/Graphics/Renderer.h>
#include <Urho3D/Resource/ResourceCache.h>
#include <Urho3D/Scene/Scene.h>
#include <Urho3D/Urho2D/StaticSprite2D.h>
#include <Urho3D/UI/Text.h>
#include <Urho3D/Urho2D/TileMap2D.h>
#include <Urho3D/Urho2D/TileMapLayer2D.h>
#include <Urho3D/Urho2D/TmxFile2D.h>
#include "Urho2DTileMap.h"
#include <Urho3D/DebugNew.h>
URHO3D_DEFINE_APPLICATION_MAIN(Urho2DTileMap)
Urho2DTileMap::Urho2DTileMap(Context* context) :
Sample(context)
{
}
void Urho2DTileMap::Start()
{
// Execute base class startup
Sample::Start();
// Enable OS cursor
GetSubsystem<Input>()->SetMouseVisible(true);
// 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_RELATIVE);
}
void Urho2DTileMap::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);
camera->SetZoom(1.0f * Min((float)graphics->GetWidth() / 1280.0f, (float)graphics->GetHeight() / 800.0f)); // Set zoom according to user's resolution to ensure full visibility (initial zoom (1.0) is set for full visibility at 1280x800 resolution)
auto* cache = GetSubsystem<ResourceCache>();
// Get tmx file
auto* tmxFile = cache->GetResource<TmxFile2D>("Urho2D/isometric_grass_and_water.tmx");
if (!tmxFile)
return;
SharedPtr<Node> tileMapNode(scene_->CreateChild("TileMap"));
tileMapNode->SetPosition(Vector3(0.0f, 0.0f, -1.0f));
auto* tileMap = tileMapNode->CreateComponent<TileMap2D>();
// Set animation
tileMap->SetTmxFile(tmxFile);
// Set camera's position
const TileMapInfo2D& info = tileMap->GetInfo();
float x = info.GetMapWidth() * 0.5f;
float y = info.GetMapHeight() * 0.5f;
cameraNode_->SetPosition(Vector3(x, y, -10.0f));
}
void Urho2DTileMap::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 move, use PageUp PageDown keys to zoom.\n LMB to remove a tile, RMB to swap grass and water.");
instructionText->SetFont(cache->GetResource<Font>("Fonts/Anonymous Pro.ttf"), 15);
// Position the text relative to the screen center
instructionText->SetHorizontalAlignment(HA_CENTER);
instructionText->SetVerticalAlignment(VA_CENTER);
instructionText->SetPosition(0, ui->GetRoot()->GetHeight() / 4);
}
void Urho2DTileMap::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 Urho2DTileMap::MoveCamera(float timeStep)
{
// Do not move if the UI has a focused element (the console)
if (GetSubsystem<UI>()->GetFocusElement())
return;
auto* input = GetSubsystem<Input>();
// Movement speed as world units per second
const float MOVE_SPEED = 4.0f;
// Read WASD keys and move the camera scene node to the corresponding direction if they are pressed
if (input->GetKeyDown(KEY_W))
cameraNode_->Translate(Vector3::UP * MOVE_SPEED * timeStep);
if (input->GetKeyDown(KEY_S))
cameraNode_->Translate(Vector3::DOWN * MOVE_SPEED * timeStep);
if (input->GetKeyDown(KEY_A))
cameraNode_->Translate(Vector3::LEFT * MOVE_SPEED * timeStep);
if (input->GetKeyDown(KEY_D))
cameraNode_->Translate(Vector3::RIGHT * MOVE_SPEED * timeStep);
if (input->GetKeyDown(KEY_PAGEUP))
{
auto* camera = cameraNode_->GetComponent<Camera>();
camera->SetZoom(camera->GetZoom() * 1.01f);
}
if (input->GetKeyDown(KEY_PAGEDOWN))
{
auto* camera = cameraNode_->GetComponent<Camera>();
camera->SetZoom(camera->GetZoom() * 0.99f);
}
}
void Urho2DTileMap::SubscribeToEvents()
{
// Subscribe HandleUpdate() function for processing update events
SubscribeToEvent(E_UPDATE, URHO3D_HANDLER(Urho2DTileMap, HandleUpdate));
// Listen to mouse clicks
SubscribeToEvent(E_MOUSEBUTTONDOWN, URHO3D_HANDLER(Urho2DTileMap, HandleMouseButtonDown));
// Unsubscribe the SceneUpdate event from base class to prevent camera pitch and yaw in 2D sample
UnsubscribeFromEvent(E_SCENEUPDATE);
}
void Urho2DTileMap::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();
// Move the camera, scale movement with time step
MoveCamera(timeStep);
}
void Urho2DTileMap::HandleMouseButtonDown(StringHash eventType, VariantMap& eventData)
{
auto* input = GetSubsystem<Input>();
Node* tileMapNode = scene_->GetChild("TileMap", true);
auto* map = tileMapNode->GetComponent<TileMap2D>();
TileMapLayer2D* layer = map->GetLayer(0);
Vector2 pos = GetMousePositionXY();
int x, y;
if (map->PositionToTileIndex(x, y, pos))
{
// Get tile's sprite. Note that layer.GetTile(x, y).sprite is read-only, so we get the sprite through tile's node
Node* n = layer->GetTileNode(x, y);
if (!n)
return;
auto* sprite = n->GetComponent<StaticSprite2D>();
if (input->GetMouseButtonDown(MOUSEB_RIGHT))
{
// Swap grass and water
if (layer->GetTile(x, y)->GetGid() < 9) // First 8 sprites in the "isometric_grass_and_water.png" tileset are mostly grass and from 9 to 24 they are mostly water
sprite->SetSprite(layer->GetTile(0, 0)->GetSprite()); // Replace grass by water sprite used in top tile
else sprite->SetSprite(layer->GetTile(24, 24)->GetSprite()); // Replace water by grass sprite used in bottom tile
}
else sprite->SetSprite(nullptr); // 'Remove' sprite
}
}
Vector2 Urho2DTileMap::GetMousePositionXY()
{
auto* input = GetSubsystem<Input>();
auto* graphics = GetSubsystem<Graphics>();
auto* camera = cameraNode_->GetComponent<Camera>();
Vector3 screenPoint = Vector3((float)input->GetMousePosition().x_ / graphics->GetWidth(), (float)input->GetMousePosition().y_ / graphics->GetHeight(), 10.0f);
Vector3 worldPoint = camera->ScreenToWorldPoint(screenPoint);
return Vector2(worldPoint.x_, worldPoint.y_);
}