spine-runtimes/spine-ts/core/src/attachments/RegionAttachment.ts

/******************************************************************************
 * Spine Runtimes License Agreement
 * Last updated May 1, 2019. Replaces all prior versions.
 *
 * Copyright (c) 2013-2019, Esoteric Software LLC
 *
 * Integration of the Spine Runtimes into software or otherwise creating
 * derivative works of the Spine Runtimes is permitted under the terms and
 * conditions of Section 2 of the Spine Editor License Agreement:
 * http://esotericsoftware.com/spine-editor-license
 *
 * Otherwise, it is permitted to integrate the Spine Runtimes into software
 * or otherwise create derivative works of the Spine Runtimes (collectively,
 * "Products"), provided that each user of the Products must obtain their own
 * Spine Editor license and redistribution of the Products in any form must
 * include this license and copyright notice.
 *
 * THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
 * NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY DIRECT, INDIRECT,
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module spine {
	export class RegionAttachment extends Attachment {
		static OX1 = 0;
		static OY1 = 1;
		static OX2 = 2;
		static OY2 = 3;
		static OX3 = 4;
		static OY3 = 5;
		static OX4 = 6;
		static OY4 = 7;

		static X1 = 0;
		static Y1 = 1;
		static C1R = 2;
		static C1G = 3;
		static C1B = 4;
		static C1A = 5;
		static U1 = 6;
		static V1 = 7;

		static X2 = 8;
		static Y2 = 9;
		static C2R = 10;
		static C2G = 11;
		static C2B = 12;
		static C2A = 13;
		static U2 = 14;
		static V2 = 15;

		static X3 = 16;
		static Y3 = 17;
		static C3R = 18;
		static C3G = 19;
		static C3B = 20;
		static C3A = 21;
		static U3 = 22;
		static V3 = 23;

		static X4 = 24;
		static Y4 = 25;
		static C4R = 26;
		static C4G = 27;
		static C4B = 28;
		static C4A = 29;
		static U4 = 30;
		static V4 = 31;

		x = 0; y = 0; scaleX = 1; scaleY = 1; rotation = 0; width = 0; height = 0;
		color = new Color(1, 1, 1, 1);

		path: string;
		rendererObject: any;
		region: TextureRegion;

		offset = Utils.newFloatArray(8);
		uvs = Utils.newFloatArray(8);

		tempColor = new Color(1, 1, 1, 1);

		constructor (name:string) {
			super(name);
		}

		updateOffset () : void {
			let regionScaleX = this.width / this.region.originalWidth * this.scaleX;
			let regionScaleY = this.height / this.region.originalHeight * this.scaleY;
			let localX = -this.width / 2 * this.scaleX + this.region.offsetX * regionScaleX;
			let localY = -this.height / 2 * this.scaleY + this.region.offsetY * regionScaleY;
			let localX2 = localX + this.region.width * regionScaleX;
			let localY2 = localY + this.region.height * regionScaleY;
			let radians = this.rotation * Math.PI / 180;
			let cos = Math.cos(radians);
			let sin = Math.sin(radians);
			let localXCos = localX * cos + this.x;
			let localXSin = localX * sin;
			let localYCos = localY * cos + this.y;
			let localYSin = localY * sin;
			let localX2Cos = localX2 * cos + this.x;
			let localX2Sin = localX2 * sin;
			let localY2Cos = localY2 * cos + this.y;
			let localY2Sin = localY2 * sin;
			let offset = this.offset;
			offset[RegionAttachment.OX1] = localXCos - localYSin;
			offset[RegionAttachment.OY1] = localYCos + localXSin;
			offset[RegionAttachment.OX2] = localXCos - localY2Sin;
			offset[RegionAttachment.OY2] = localY2Cos + localXSin;
			offset[RegionAttachment.OX3] = localX2Cos - localY2Sin;
			offset[RegionAttachment.OY3] = localY2Cos + localX2Sin;
			offset[RegionAttachment.OX4] = localX2Cos - localYSin;
			offset[RegionAttachment.OY4] = localYCos + localX2Sin;
		}

		setRegion (region: TextureRegion) : void {
			this.region = region;
			let uvs = this.uvs;
			if (region.rotate) {
				uvs[2] = region.u;
				uvs[3] = region.v2;
				uvs[4] = region.u;
				uvs[5] = region.v;
				uvs[6] = region.u2;
				uvs[7] = region.v;
				uvs[0] = region.u2;
				uvs[1] = region.v2;
			} else {
				uvs[0] = region.u;
				uvs[1] = region.v2;
				uvs[2] = region.u;
				uvs[3] = region.v;
				uvs[4] = region.u2;
				uvs[5] = region.v;
				uvs[6] = region.u2;
				uvs[7] = region.v2;
			}
		}

		computeWorldVertices (bone: Bone, worldVertices: ArrayLike<number>, offset: number, stride: number) {
			let vertexOffset = this.offset;
			let x = bone.worldX, y = bone.worldY;
			let a = bone.a, b = bone.b, c = bone.c, d = bone.d;
			let offsetX = 0, offsetY = 0;

			offsetX = vertexOffset[RegionAttachment.OX1];
			offsetY = vertexOffset[RegionAttachment.OY1];
			worldVertices[offset] = offsetX * a + offsetY * b + x; // br
			worldVertices[offset + 1] = offsetX * c + offsetY * d + y;
			offset += stride;

			offsetX = vertexOffset[RegionAttachment.OX2];
			offsetY = vertexOffset[RegionAttachment.OY2];
			worldVertices[offset] = offsetX * a + offsetY * b + x; // bl
			worldVertices[offset + 1] = offsetX * c + offsetY * d + y;
			offset += stride;

			offsetX = vertexOffset[RegionAttachment.OX3];
			offsetY = vertexOffset[RegionAttachment.OY3];
			worldVertices[offset] = offsetX * a + offsetY * b + x; // ul
			worldVertices[offset + 1] = offsetX * c + offsetY * d + y;
			offset += stride;

			offsetX = vertexOffset[RegionAttachment.OX4];
			offsetY = vertexOffset[RegionAttachment.OY4];
			worldVertices[offset] = offsetX * a + offsetY * b + x; // ur
			worldVertices[offset + 1] = offsetX * c + offsetY * d + y;
		}
	}
}