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mdx-m3-viewer

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A browser WebGL model viewer. Mainly focused on models of the games Warcraft 3 and Starcraft 2.

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import M3ParserRegion from '../../../parsers/m3/region'; import ShaderProgram from '../../gl/program'; import M3Model from './model'; /** * An M3 region. */ export default class M3Region { gl: WebGLRenderingContext; firstBoneLookupIndex: number; boneWeightPairsCount: number; offset: number; verticesCount: number; elements: number; constructor(model: M3Model, region: M3ParserRegion, triangles: Uint16Array, elementArray: Uint16Array, offset: number) { let firstVertexIndex = region.firstVertexIndex; let triangleIndicesCount = region.triangleIndicesCount; let firstTriangleIndex = region.firstTriangleIndex; // Note for implementors: the one original vertex indices array could be used with access to the base-vertex draw elements function. // See https://www.opengl.org/sdk/docs/man3/xhtml/glDrawElementsBaseVertex.xml // firstTriangleIndex is the indices offset. // firstVertexIndex is the base vertex. for (let i = 0; i < triangleIndicesCount; i++) { elementArray[offset + i] = triangles[firstTriangleIndex + i] + firstVertexIndex; } this.gl = model.viewer.gl; this.firstBoneLookupIndex = region.firstBoneLookupIndex; this.boneWeightPairsCount = region.boneWeightPairsCount; this.offset = offset * 2; this.verticesCount = region.verticesCount; this.elements = triangleIndicesCount; } render(shader: ShaderProgram) { let gl = this.gl; gl.uniform1f(shader.uniforms.u_firstBoneLookupIndex, this.firstBoneLookupIndex); gl.uniform1f(shader.uniforms.u_boneWeightPairsCount, this.boneWeightPairsCount); gl.drawElements(gl.TRIANGLES, this.elements, gl.UNSIGNED_SHORT, this.offset); } }