73 lines
2.2 KiB
TypeScript
73 lines
2.2 KiB
TypeScript
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import { IndexBuffer } from './buffer';
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import { Shader, Uniform1i } from './shader';
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import { VertexArray } from './vertexBufferLayout';
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import { Texture } from './texture';
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export interface Renderable {
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render(gl: WebGLRenderingContext): void;
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}
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export class Renderer {
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renderables: Renderable[];
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indexBuffers: IndexBuffer[];
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vertexArrays: VertexArray[];
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shaders: Shader[];
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textures: Texture[];
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constructor() {
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this.indexBuffers = [];
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this.vertexArrays = [];
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this.shaders = [];
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this.textures = [];
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}
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addRenderable(item: Renderable) {
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this.renderables.push(item);
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}
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addToDraw(indexBuffer: IndexBuffer, vertexArray: VertexArray, shader: Shader, texture?: Texture): number {
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this.indexBuffers.push(indexBuffer);
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this.vertexArrays.push(vertexArray);
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this.shaders.push(shader);
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this.textures.push(texture);
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return this.indexBuffers.length - 1;
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}
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render(gl: WebGLRenderingContext) {
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const maxTextures = gl.getParameter(gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS);
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let texLocation = 0;
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for(let i = 0; i < this.indexBuffers.length; i ++) {
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const indexBuffer = this.indexBuffers[i];
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const vertexArray = this.vertexArrays[i];
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const shader = this.shaders[i];
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const texture = this.textures[i];
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if (texture) {
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shader.uniform(gl, texture.name, new Uniform1i(texLocation));
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texture.bind(gl, texLocation);
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texLocation ++;
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if (texLocation > maxTextures) {
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console.error("Using too many textures, this is not supported yet\nUndefined behaviour!");
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}
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}
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if (vertexArray && shader) {
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vertexArray.bind(gl, shader);
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if (indexBuffer) {
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indexBuffer.bind(gl);
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gl.drawElements(gl.TRIANGLES, indexBuffer.getCount(), gl.UNSIGNED_SHORT, 0);
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} else {
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console.error("IndexBuffer is required to render, for now");
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}
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}
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}
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}
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}
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