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import Renderer from './Renderer';
class Scene {
private triangleVertexPositionBuffer: WebGLBuffer;
private squareVertexPositionBuffer: WebGLBuffer;
constructor(private r: Renderer) {
this.triangleVertexPositionBuffer = r.createBuffer();
r.gl.bindBuffer(r.gl.ARRAY_BUFFER, this.triangleVertexPositionBuffer);
const triangleVertices = [
-1.5, 1.0,
-2.5, -1.0,
-0.5, -1.0,
];
r.gl.bufferData(r.gl.ARRAY_BUFFER, new Float32Array(triangleVertices), r.gl.STATIC_DRAW);
this.squareVertexPositionBuffer = r.createBuffer();
r.gl.bindBuffer(r.gl.ARRAY_BUFFER, this.squareVertexPositionBuffer);
const squareVertices = [
2.5, 1.0,
0.5, 1.0,
2.5, -1.0,
0.5, -1.0,
];
r.gl.bufferData(r.gl.ARRAY_BUFFER, new Float32Array(squareVertices), r.gl.STATIC_DRAW);
}
draw(): void {
this.r.gl.clear(this.r.gl.COLOR_BUFFER_BIT | this.r.gl.DEPTH_BUFFER_BIT);
this.r.gl.bindBuffer(this.r.gl.ARRAY_BUFFER, this.triangleVertexPositionBuffer);
this.r.gl.vertexAttribPointer(this.r.vertexPosLoc, 2, this.r.gl.FLOAT, false, 0, 0);
this.r.gl.drawArrays(this.r.gl.TRIANGLES, 0, 3);
this.r.gl.bindBuffer(this.r.gl.ARRAY_BUFFER, this.squareVertexPositionBuffer);
this.r.gl.vertexAttribPointer(this.r.vertexPosLoc, 2, this.r.gl.FLOAT, false, 0, 0);
this.r.gl.drawArrays(this.r.gl.TRIANGLE_STRIP, 0, 4);
}
}
export default Scene;
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