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coin.js
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/// <reference path="webgl.d.ts" />
let Coin = class {
constructor(gl, pos) {
this.positionBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, this.positionBuffer);
var n = 20;
this.positions = [];
var r = 0.3;
var angle = ( 2.0*Math.PI / n);
var theta = 0.0;
for(i=0;i<n;i++){
this.positions[9*i] = 0.0;
this.positions[9*i + 1] = 0.0;
this.positions[9*i + 2] = 0.0;
this.positions[9*i + 3] = r*Math.cos(theta);
this.positions[9*i + 4] = r*Math.sin(theta);
this.positions[9*i + 5] = 0.0;
theta += angle;
this.positions[9*i + 6] = r*Math.cos(theta);
this.positions[9*i + 7] = r*Math.sin(theta);
this.positions[9*i + 8] = 0.0;
}
// this.positions = [
// // Front face
// -0.25, -0.25, 0.02,
// 0.25, -0.25, 0.02,
// 0.25, 0.25, 0.02,
// -0.25, 0.25, 0.02,
// //Back Face
// -0.25, -0.25, -0.02,
// 0.25, -0.25, -0.02,
// 0.25, 0.25, -0.02,
// -0.25, 0.25, -0.02,
// //Top Face
// -0.25, 0.25, -0.02,
// 0.25, 0.25, -0.02,
// 0.25, 0.25, 0.02,
// -0.25, 0.25, 0.02,
// //Bottom Face
// -0.25, -0.25, -0.02,
// 0.25, -0.25, -0.02,
// 0.25, -0.25, 0.02,
// -0.25, -0.25, 0.02,
// //Left Face
// -0.25, -0.25, -0.02,
// -0.25, 0.25, -0.02,
// -0.25, 0.25, 0.02,
// -0.25, -0.25, 0.02,
// //Right Face
// 0.25, -0.25, -0.02,
// 0.25, 0.25, -0.02,
// 0.25, 0.25, 0.02,
// 0.25, -0.25, 0.02,
// ];
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(this.positions),
gl.STATIC_DRAW);
this.rotation = 0;
this.pos = pos;
// gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(this.positions), gl.STATIC_DRAW);
const textureCoordBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, textureCoordBuffer);
// const textureCoordinates = [
// // Front
// 0.0, 0.0,
// 1.0, 0.0,
// 1.0, 1.0,
// 0.0, 1.0,
// // Back
// 0.0, 0.0,
// 1.0, 0.0,
// 1.0, 1.0,
// 0.0, 1.0,
// // Top
// 0.0, 0.0,
// 1.0, 0.0,
// 1.0, 1.0,
// 0.0, 1.0,
// // Bottom
// 0.0, 0.0,
// 1.0, 0.0,
// 1.0, 1.0,
// 0.0, 1.0,
// // Right
// 0.0, 0.0,
// 1.0, 0.0,
// 1.0, 1.0,
// 0.0, 1.0,
// // Left
// 0.0, 0.0,
// 1.0, 0.0,
// 1.0, 1.0,
// 0.0, 1.0,
// ];
var textureCoordinates = [];
for(i = 0; i < 60; i++){
textureCoordinates.push(0);
textureCoordinates.push(0);
textureCoordinates.push(1);
textureCoordinates.push(0);
textureCoordinates.push(1);
textureCoordinates.push(1);
textureCoordinates.push(0);
textureCoordinates.push(1);
}
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(textureCoordinates),
gl.STATIC_DRAW);
// this.faceColors = [
// [ Math.random(), Math.random(), Math.random(), Math.random()], // Left face: purple
// [ Math.random(), Math.random(), Math.random(), Math.random()], // Left face: purple
// [ Math.random(), Math.random(), Math.random(), Math.random()], // Left face: purple
// [ Math.random(), Math.random(), Math.random(), Math.random()], // Left face: purple
// [ Math.random(), Math.random(), Math.random(), Math.random()], // Left face: purple
// [ Math.random(), Math.random(), Math.random(), Math.random()], // Left face: purple
// ];
// var colors = [];
// for (var j = 0; j < this.faceColors.length; ++j) {
// const c = this.faceColors[j];
// // Repeat each color four times for the four vertices of the face
// colors = colors.concat(c, c, c, c);
// }
// const colorBuffer = gl.createBuffer();
// gl.bindBuffer(gl.ARRAY_BUFFER, colorBuffer);
// gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(colors), gl.STATIC_DRAW);
// Build the element array buffer; this specifies the indices
// into the vertex arrays for each face's vertices.
const indexBuffer = gl.createBuffer();
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, indexBuffer);
// This array defines each face as two triangles, using the
// indices into the vertex array to specify each triangle's
// position.
var indices = []
for(i = 0; i < 60; i++)
indices[i] = i;
// console.log(indices);
// const indices = [
// 0, 1, 2, 0, 2, 3, // front
// 4, 5, 6, 4, 6, 7,
// 8, 9, 10, 8, 10, 11,
// 12, 13, 14, 12, 14, 15,
// 16, 17, 18, 16, 18, 19,
// 20, 21, 22, 20, 22, 23,
// ];
// Now send the element array to GL
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER,
new Uint16Array(indices), gl.STATIC_DRAW);
this.buffer = {
position: this.positionBuffer,
texture: textureCoordBuffer,
indices: indexBuffer,
}
}
drawCoin(gl, projectionMatrix, programInfo, deltaTime, texture) {
const modelViewMatrix = mat4.create();
mat4.translate(
modelViewMatrix,
modelViewMatrix,
this.pos
);
//this.rotation += Math.PI / (((Math.random()) % 100) + 50);
mat4.rotate(modelViewMatrix,
modelViewMatrix,
this.rotation,
[1, 1, 1]);
{
const numComponents = 3;
const type = gl.FLOAT;
const normalize = false;
const stride = 0;
const offset = 0;
gl.bindBuffer(gl.ARRAY_BUFFER, this.buffer.position);
gl.vertexAttribPointer(
programInfo.attribLocations.vertexPosition,
numComponents,
type,
normalize,
stride,
offset);
gl.enableVertexAttribArray(
programInfo.attribLocations.vertexPosition);
}
// Tell WebGL how to pull out the colors from the color buffer
// into the vertexColor attribute.
{
const numComponents = 2;
const type = gl.FLOAT;
const normalize = false;
const stride = 0;
const offset = 0;
gl.bindBuffer(gl.ARRAY_BUFFER, this.buffer.texture);
gl.vertexAttribPointer(
programInfo.attribLocations.textureCoord,
numComponents,
type,
normalize,
stride,
offset);
gl.enableVertexAttribArray(
programInfo.attribLocations.textureCoord);
// Tell WebGL we want to affect texture unit 0
gl.activeTexture(gl.TEXTURE0);
// Bind the texture to texture unit 0
gl.bindTexture(gl.TEXTURE_2D, texture);
// Tell the shader we bound the texture to texture unit 0
gl.uniform1i(programInfo.uniformLocations.uSampler, 0 );
}
// Tell WebGL which indices to use to index the vertices
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.buffer.indices);
// Tell WebGL to use our program when drawing
gl.useProgram(programInfo.program);
// Set the shader uniforms
gl.uniformMatrix4fv(
programInfo.uniformLocations.projectionMatrix,
false,
projectionMatrix);
gl.uniformMatrix4fv(
programInfo.uniformLocations.modelViewMatrix,
false,
modelViewMatrix);
{
const vertexCount = 60;
const type = gl.UNSIGNED_SHORT;
const offset = 0;
gl.drawElements(gl.TRIANGLES, vertexCount, type, offset);
}
}
};