Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2013 Goran Mrzljak * * 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. */ package com.turbogerm.helljump.game.platforms.features; import com.badlogic.gdx.assets.AssetManager; import com.badlogic.gdx.graphics.Color; import com.badlogic.gdx.graphics.g2d.Animation; import com.badlogic.gdx.graphics.g2d.SpriteBatch; import com.badlogic.gdx.graphics.g2d.TextureAtlas; import com.badlogic.gdx.graphics.g2d.TextureRegion; import com.badlogic.gdx.graphics.g2d.TextureAtlas.AtlasRegion; import com.badlogic.gdx.math.Vector2; import com.badlogic.gdx.utils.Array; import com.turbogerm.germlibrary.util.ColorInterpolator; import com.turbogerm.helljump.dataaccess.PlatformData; import com.turbogerm.helljump.dataaccess.PlatformFeatureData; import com.turbogerm.helljump.game.CollisionEffects; import com.turbogerm.helljump.resources.ResourceNames; final class FlamePlatformFeature extends PlatformFeatureBase { private static final float RENDER_PRECEDENCE = 2.0f; private static final float CONTACT_PRECEDENCE = 2.0f; private static final float FIRE_FRAME_DURATION = 0.15f; private static final float FIRE_SPRITE_WIDTH = 2.0f; private static final float FIRE_SPRITE_HEIGHT = 0.6f; private static final Color FLAME_COLOR; private static final Color DORMANT_COLOR; private final Animation mFireAnimation; private float mFireAnimationTime = 0.0f; private final FlameStateMachine mFlameStateMachine; private boolean mIsFlameActive; private float mFirstCycleCountdown; private final ColorInterpolator mColorInterpolator; static { FLAME_COLOR = new Color(1.0f, 0.5f, 0.0f, 1.0f); DORMANT_COLOR = new Color(FLAME_COLOR); DORMANT_COLOR.mul(0.4f); DORMANT_COLOR.a = 1.0f; } public FlamePlatformFeature(PlatformFeatureData featureData, AssetManager assetManager) { mFirstCycleCountdown = Float .valueOf(featureData.getProperty(PlatformFeatureData.FLAME_CYCLE_OFFSET_PROPERTY)); float flameDuration = Float .valueOf(featureData.getProperty(PlatformFeatureData.FLAME_FLAME_DURATION_PROPERTY)); float dormantDuration = Float .valueOf(featureData.getProperty(PlatformFeatureData.FLAME_DORMANT_DURATION_PROPERTY)); float transitionDuration = Float .valueOf(featureData.getProperty(PlatformFeatureData.FLAME_TRANSITION_DURATION_PROPERTY)); mFlameStateMachine = new FlameStateMachine(flameDuration, dormantDuration, transitionDuration); mIsFlameActive = false; TextureAtlas platformsAtlas = assetManager.get(ResourceNames.PLATFORMS_ATLAS); Array<AtlasRegion> fireAtlasRegions = platformsAtlas.findRegions(ResourceNames.PLATFORM_FIRE_IMAGE_NAME); mFireAnimation = new Animation(FIRE_FRAME_DURATION, fireAtlasRegions, Animation.LOOP); mFireAnimationTime = 0.0f; mRenderPrecedence = RENDER_PRECEDENCE; mContactPrecendence = CONTACT_PRECEDENCE; mColorInterpolator = new ColorInterpolator(); } @Override public void update(float delta) { if (mFirstCycleCountdown > 0.0f) { mFirstCycleCountdown -= delta; if (mFirstCycleCountdown >= 0.0f) { delta = 0.0f; } else { delta = -mFirstCycleCountdown; mFirstCycleCountdown = 0.0f; } } mFlameStateMachine.update(delta); if (mFlameStateMachine.getCurrentState() == FlameStateMachine.FLAME) { if (!mIsFlameActive) { mIsFlameActive = true; mFireAnimationTime = 0.0f; } else { mFireAnimationTime += delta; } } else { mIsFlameActive = false; } } @Override public void render(SpriteBatch batch, Vector2 platformPosition, Color color) { if (mIsFlameActive) { TextureRegion fireAnimationFrame = mFireAnimation.getKeyFrame(mFireAnimationTime); batch.draw(fireAnimationFrame, platformPosition.x, platformPosition.y + PlatformData.PLATFORM_HEIGHT, FIRE_SPRITE_WIDTH, FIRE_SPRITE_HEIGHT); } } @Override public void applyModifier(PlatformModifier modifier) { Color color = modifier.spriteColor; float oldAplha = color.a; switch (mFlameStateMachine.getCurrentState()) { case FlameStateMachine.DORMANT: color.set(DORMANT_COLOR); break; case FlameStateMachine.TRANSITION1: color.set(mColorInterpolator.interpolateColor(DORMANT_COLOR, FLAME_COLOR, mFlameStateMachine.getStateElapsedFraction())); break; case FlameStateMachine.FLAME: color.set(FLAME_COLOR); break; case FlameStateMachine.TRANSITION2: color.set(mColorInterpolator.interpolateColor(FLAME_COLOR, DORMANT_COLOR, mFlameStateMachine.getStateElapsedFraction())); break; } color.a = oldAplha; } @Override public boolean isContact(float relativeCollisionPointX) { return mIsFlameActive; } @Override public void applyContact(CollisionEffects collisionEffects) { collisionEffects.set(CollisionEffects.BURN); } private static class FlameStateMachine { public static final int DORMANT = 0; public static final int TRANSITION1 = 1; public static final int FLAME = 2; public static final int TRANSITION2 = 3; private static final int STATE_COUNT = 4; private final float[] mStateDurations; private int mCurrentState; private float mCurrentStateElapsed; public FlameStateMachine(float flameDuration, float dormantDuration, float transitionDuration) { mCurrentState = DORMANT; mCurrentStateElapsed = 0.0f; mStateDurations = new float[STATE_COUNT]; mStateDurations[FLAME] = flameDuration; mStateDurations[DORMANT] = dormantDuration; mStateDurations[TRANSITION1] = transitionDuration; mStateDurations[TRANSITION2] = transitionDuration; } public void update(float delta) { mCurrentStateElapsed += delta; if (mCurrentStateElapsed >= mStateDurations[mCurrentState]) { mCurrentStateElapsed -= mStateDurations[mCurrentState]; mCurrentState = (mCurrentState + 1) % STATE_COUNT; } } public int getCurrentState() { return mCurrentState; } public float getStateElapsedFraction() { return mCurrentStateElapsed / mStateDurations[mCurrentState]; } } }