136 lines
No EOL
4 KiB
JavaScript
136 lines
No EOL
4 KiB
JavaScript
'use strict';
|
|
var nothingness = 1, nGain = 0.01; //todo: outsource into another file
|
|
|
|
var canvas, gl, positionAttributeLocation, positionBuffer, matBuffer, sizeBuffer, distBuffer
|
|
|
|
function createShader(gl, type, source) {
|
|
var shader = gl.createShader(type);
|
|
gl.shaderSource(shader, source);
|
|
gl.compileShader(shader);
|
|
var success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
|
|
if (success) {
|
|
return shader;
|
|
}
|
|
|
|
console.log(gl.getShaderInfoLog(shader));
|
|
gl.deleteShader(shader);
|
|
}
|
|
|
|
function createProgram(gl, vertexShader, fragmentShader) {
|
|
var program = gl.createProgram();
|
|
gl.attachShader(program, vertexShader);
|
|
gl.attachShader(program, fragmentShader);
|
|
gl.linkProgram(program);
|
|
var success = gl.getProgramParameter(program, gl.LINK_STATUS);
|
|
if (success) {
|
|
return program;
|
|
}
|
|
|
|
console.log(gl.getProgramInfoLog(program));
|
|
gl.deleteProgram(program);
|
|
}
|
|
|
|
function main() {
|
|
// Get A WebGL context
|
|
canvas = document.querySelector("#c");
|
|
gl = canvas.getContext("webgl");
|
|
if (!gl) {
|
|
return;
|
|
}
|
|
|
|
var vertexShaderSource = document.querySelector("#vertex-shader-2d").text;
|
|
var fragmentShaderSource = document.querySelector("#fragment-shader-2d").text;
|
|
|
|
var vertexShader = createShader(gl, gl.VERTEX_SHADER, vertexShaderSource);
|
|
var fragmentShader = createShader(gl, gl.FRAGMENT_SHADER, fragmentShaderSource);
|
|
|
|
var program = createProgram(gl, vertexShader, fragmentShader);
|
|
|
|
positionAttributeLocation = gl.getAttribLocation(program, "a_position");
|
|
matBuffer = gl.getUniformLocation(program, "mat_thing");
|
|
sizeBuffer = gl.getUniformLocation(program, "size_thing");
|
|
distBuffer = gl.getUniformLocation(program, "dist_thing");
|
|
|
|
positionBuffer = gl.createBuffer();
|
|
|
|
gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
|
|
|
|
gl.useProgram(program);
|
|
|
|
// Tell the attribute how to get data out of positionBuffer (ARRAY_BUFFER)
|
|
var size = 2; // 2 components per iteration
|
|
var type = gl.FLOAT; // the data is 32bit floats
|
|
var normalize = false; // don't normalize the data
|
|
var stride = 0; // 0 = move forward size * sizeof(type) each iteration to get the next position
|
|
var offset = 0; // start at the beginning of the buffer
|
|
gl.vertexAttribPointer(
|
|
positionAttributeLocation, size, type, normalize, stride, offset);
|
|
|
|
// draw
|
|
renderThing();
|
|
}
|
|
|
|
function renderThing() {
|
|
twgl.resizeCanvasToDisplaySize(gl.canvas);
|
|
|
|
gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
|
|
|
|
gl.clearColor(0, 0, 0, 0);
|
|
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
|
|
|
|
var ratio = gl.canvas.width / gl.canvas.height;
|
|
var ratioA = Math.max(ratio, 1);
|
|
var ratioB = ratioA / ratio;
|
|
|
|
var positions = [
|
|
-1, -1,
|
|
-1, 1,
|
|
1, 1,
|
|
-1, -1,
|
|
1, -1,
|
|
1, 1
|
|
];
|
|
gl.enableVertexAttribArray(positionAttributeLocation);
|
|
|
|
gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
|
|
|
|
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(positions), gl.STATIC_DRAW);
|
|
|
|
gl.uniformMatrix4fv(matBuffer, false, new Float32Array([
|
|
ratioB, 0, 0, 0,
|
|
0, ratioA, 0, 0,
|
|
0, 0, 1, 0,
|
|
0, 0, 0, 1
|
|
]));
|
|
|
|
hud.textContent = `${Math.floor(nothingness * 100) / 100} nothings; ${Math.floor(nGain * 60 * 100) / 100} nil/sec`
|
|
|
|
gl.uniform1f(sizeBuffer, -Math.log(nothingness));
|
|
gl.uniform1f(distBuffer, 0.1 + nGain / (nothingness+10));
|
|
|
|
var primitiveType = gl.TRIANGLES;
|
|
var offset = 0;
|
|
var count = 6;
|
|
gl.drawArrays(primitiveType, offset, count);
|
|
requestAnimationFrame(renderThing)
|
|
}
|
|
let hud = document.querySelector('.hud');
|
|
|
|
main();
|
|
requestAnimationFrame(renderThing)
|
|
|
|
let clicking = false;
|
|
|
|
document.body.onclick = async function() {
|
|
if (clicking) return;
|
|
clicking = true;
|
|
let oldNGain = nGain;
|
|
nGain += 0.05;
|
|
while (nGain > oldNGain) {
|
|
nGain -= 0.005;
|
|
nothingness += nGain;
|
|
await new Promise((res) => setTimeout(res,1000 / 60))
|
|
}
|
|
nGain = oldNGain;
|
|
clicking = false;
|
|
} |