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Create an animation node w/ the new scripting and node API
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redhorizon-engine/source/nz/net/ultraq/redhorizon/engine/scenegraph/nodes/Animation.groovy
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| /* | ||
| * Copyright 2024, Emanuel Rabina (http://www.ultraq.net.nz/) | ||
| * | ||
| * 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. | ||
| */ | ||
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| package nz.net.ultraq.redhorizon.engine.scenegraph.nodes | ||
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| import nz.net.ultraq.redhorizon.engine.graphics.GraphicsElement | ||
| import nz.net.ultraq.redhorizon.engine.graphics.GraphicsRenderer | ||
| import nz.net.ultraq.redhorizon.engine.graphics.GraphicsRequests.ShaderRequest | ||
| import nz.net.ultraq.redhorizon.engine.graphics.GraphicsRequests.SpriteMeshRequest | ||
| import nz.net.ultraq.redhorizon.engine.graphics.GraphicsRequests.TextureRequest | ||
| import nz.net.ultraq.redhorizon.engine.graphics.Material | ||
| import nz.net.ultraq.redhorizon.engine.graphics.Mesh | ||
| import nz.net.ultraq.redhorizon.engine.graphics.Shader | ||
| import nz.net.ultraq.redhorizon.engine.graphics.Texture | ||
| import nz.net.ultraq.redhorizon.engine.graphics.opengl.SpriteShader | ||
| import nz.net.ultraq.redhorizon.engine.media.Playable | ||
| import nz.net.ultraq.redhorizon.engine.scenegraph.Node | ||
| import nz.net.ultraq.redhorizon.engine.scenegraph.Scene | ||
| import nz.net.ultraq.redhorizon.engine.time.Temporal | ||
| import nz.net.ultraq.redhorizon.filetypes.AnimationFile | ||
| import nz.net.ultraq.redhorizon.filetypes.Streaming | ||
| import nz.net.ultraq.redhorizon.filetypes.StreamingFrameEvent | ||
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| import java.nio.ByteBuffer | ||
| import java.util.concurrent.Executors | ||
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| /** | ||
| * An animation to play from a series of images/frames. | ||
| * | ||
| * @author Emanuel Rabina | ||
| */ | ||
| class Animation extends Node<Animation> implements GraphicsElement, Playable, Temporal { | ||
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| final AnimationFile animationFile | ||
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| private final List<Texture> frames = [] | ||
| private long startTimeMs | ||
| private int currentFrame = -1 | ||
| private int lastFrame = -1 | ||
| private Mesh mesh | ||
| private Shader shader | ||
| private Material material | ||
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| Animation(AnimationFile animationFile) { | ||
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| bounds | ||
| .set(0, 0, animationFile.width, animationFile.forVgaMonitors ? animationFile.height * 1.2f as float : animationFile.height) | ||
| .center() | ||
| this.animationFile = animationFile | ||
| } | ||
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| @Override | ||
| void delete(GraphicsRenderer renderer) { | ||
| } | ||
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| @Override | ||
| void init(GraphicsRenderer renderer) { | ||
| } | ||
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| @Override | ||
| void onSceneAdded(Scene scene) { | ||
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| mesh = scene | ||
| .requestCreateOrGet(new SpriteMeshRequest(bounds)) | ||
| .get() | ||
| shader = scene | ||
| .requestCreateOrGet(new ShaderRequest(SpriteShader.NAME)) | ||
| .get() | ||
| material = new Material() | ||
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| var width = animationFile.width | ||
| var height = animationFile.height | ||
| var format = animationFile.format | ||
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| var requestFrame = { ByteBuffer frameData -> | ||
| return scene | ||
| .requestCreateOrGet(new TextureRequest(width, height, format, frameData.flipVertical(width, height, format))) | ||
| .get() | ||
| } | ||
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| if (animationFile instanceof Streaming) { | ||
| var decoder = animationFile.streamingDecoder | ||
| decoder.on(StreamingFrameEvent) { event -> | ||
| frames << requestFrame(event.frame) | ||
| } | ||
| Executors.newVirtualThreadPerTaskExecutor().execute(decoder) | ||
| } | ||
| else { | ||
| Executors.newVirtualThreadPerTaskExecutor().execute { -> | ||
| animationFile.frameData.each { frame -> | ||
| frames << requestFrame(frame) | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| @Override | ||
| void onSceneRemoved(Scene scene) { | ||
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| scene.requestDelete(mesh, shader, *frames) | ||
| } | ||
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| @Override | ||
| void render(GraphicsRenderer renderer) { | ||
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| if (mesh && shader && material && currentFrame != -1) { | ||
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| // Draw the current frame if available | ||
| var currentFrameTexture = frames[currentFrame] | ||
| if (currentFrameTexture) { | ||
| material.texture = currentFrameTexture | ||
| renderer.draw(mesh, getGlobalTransform(), shader, material) | ||
| } | ||
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| // Delete used frames as the animation progresses to free up memory | ||
| // NOTE: This basically ties this class to play-once streaming animations only 🤔 | ||
| if (currentFrame > 0) { | ||
| for (var i = lastFrame; i < currentFrame; i++) { | ||
| renderer.deleteTexture(frames[i]) | ||
| frames[i] = null | ||
| } | ||
| } | ||
| lastFrame = currentFrame | ||
| } | ||
| } | ||
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| @Override | ||
| void tick(long updatedTimeMs) { | ||
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| if (playing) { | ||
| Temporal.super.tick(updatedTimeMs) | ||
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| if (!startTimeMs) { | ||
| startTimeMs = currentTimeMs | ||
| } | ||
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| var nextFrame = Math.floor((currentTimeMs - startTimeMs) / 1000 * animationFile.frameRate) as int | ||
| if (nextFrame < animationFile.numFrames) { | ||
| currentFrame = nextFrame | ||
| } | ||
| else { | ||
| stop() | ||
| } | ||
| } | ||
| } | ||
| } |
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