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cube test

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biglyderv 2025-03-04 12:31:51 -05:00
parent fcf0ee4b47
commit 7caf01a4ae
Signed by: biglyderv
GPG key ID: 0E2EB0B4CD7397B5
4 changed files with 412 additions and 40 deletions
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33
docs/index.html
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@ -2,26 +2,27 @@
<html lang="en"> <html lang="en">
<head> <head>
<meta charset="utf-8" /> <meta charset="utf-8" />
<title>WebGL Demo</title> <title>WebGL Demo</title>
<script id="vertex-shader-2d" type="notjs"> <script id="vertex-shader-2d" type="notjs">
// an attribute will receive data from a buffer // an attribute will receive data from a buffer
attribute vec4 a_position; attribute vec4 a_position;
varying vec4 b_position; varying vec4 b_position;
uniform mat4 mat_thing; uniform mat4 mat_thing;
uniform mat4 mvp_thing;
// all shaders have a main function // all shaders have a main function
void main() { void main() {
// gl_Position is a special variable a vertex shader // gl_Position is a special variable a vertex shader
// is responsible for setting // is responsible for setting
gl_Position = a_position * mat_thing; gl_Position = mat_thing * mvp_thing * a_position ;
b_position = a_position; b_position = a_position;
} }
</script> </script>
<script id="fragment-shader-2d" type="notjs"> <script id="fragment-shader-2d" type="notjs">
// fragment shaders don't have a default precision so we need // fragment shaders don't have a default precision so we need
// to pick one. mediump is a good default // to pick one. mediump is a good default
@ -29,25 +30,33 @@
varying vec4 b_position; varying vec4 b_position;
uniform float size_thing; uniform float size_thing;
uniform float dist_thing; uniform float dist_thing;
uniform bool is_fg;
void main() { void main() {
// gl_FragColor is a special variable a fragment shader // gl_FragColor is a special variable a fragment shader
// is responsible for setting // is responsible for setting
if (is_fg) {
gl_FragColor = vec4(b_position.xyz,1) * 0.2 + vec4(0.3,0.3,0.3,1) * 0.8;
return;
}
float dist = (log(distance(b_position.xy,vec2(0.0))) - size_thing + dist_thing) / log(2.0) * 0.1; float dist = (log(distance(b_position.xy,vec2(0.0))) - size_thing + dist_thing) / log(2.0) * 0.1;
gl_FragColor = vec4((mod(dist,0.1) - 0.1 + 0.1 * dist_thing) * 50.0 * vec3(1,1,1),1); // return redish-purple gl_FragColor = vec4((mod(dist,0.1) - 0.1 + 0.1 * dist_thing) * 50.0 * vec3(1,1,1),1); // return redish-purple
} }
</script> </script>
<script src="/js/twgl.min.js" type="module"></script>
<script src="/js/index.js" type="module"></script> <script src="/js/cube.js"></script>
<link rel="stylesheet" href="main.css"> <script src="/js/mat.js"></script>
<script src="/js/twgl.min.js" type="module"></script>
<script src="/js/index.js" type="module"></script>
<link rel="stylesheet" href="main.css">
</head> </head>
<body> <body>
<canvas id="c" width="640" height="480"></canvas> <canvas id="c" width="640" height="480"></canvas>
<div class='hud'> <div class='hud'>
hud hud
</div> </div>
</body> </body>
</html> </html>

57
docs/js/cube.js Normal file
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@ -0,0 +1,57 @@
var MDN = MDN || {};
MDN.createCubeData = function (a, b, c) {
var positions = [
// Front face
-1.0, -1.0, 1.0,
1.0, -1.0, 1.0,
1.0, 1.0, 1.0,
-1.0, 1.0, 1.0,
// Back face
-1.0, -1.0, -1.0,
-1.0, 1.0, -1.0,
1.0, 1.0, -1.0,
1.0, -1.0, -1.0,
// Top face
-1.0, 1.0, -1.0,
-1.0, 1.0, 1.0,
1.0, 1.0, 1.0,
1.0, 1.0, -1.0,
// Bottom face
-1.0, -1.0, -1.0,
1.0, -1.0, -1.0,
1.0, -1.0, 1.0,
-1.0, -1.0, 1.0,
// Right face
1.0, -1.0, -1.0,
1.0, 1.0, -1.0,
1.0, 1.0, 1.0,
1.0, -1.0, 1.0,
// Left face
-1.0, -1.0, -1.0,
-1.0, -1.0, 1.0,
-1.0, 1.0, 1.0,
-1.0, 1.0, -1.0
];
var elements = [
0, 1, 2, 0, 2, 3, // front
4, 5, 6, 4, 6, 7, // back
8, 9, 10, 8, 10, 11, // top
12, 13, 14, 12, 14, 15, // bottom
16, 17, 18, 16, 18, 19, // right
20, 21, 22, 20, 22, 23 // left
]
let out = [];
for (let i of elements) {
out.push(positions[i * 3] * a, positions[i * 3 + 1] * b, positions[i * 3 + 2] * c)
}
return out;
}

77
docs/js/index.js
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@ -1,7 +1,7 @@
'use strict'; 'use strict';
var nothingness = 1, nGain = 0.01; //todo: outsource into another file var nothingness = 1, nGain = 0.01; //todo: outsource into another file
var canvas, gl, positionAttributeLocation, positionBuffer, matBuffer, sizeBuffer, distBuffer var canvas, gl, positionAttributeLocation, positionBuffer, matBuffer, vpBuffer, sizeBuffer, distBuffer, fgBuffer;
function createShader(gl, type, source) { function createShader(gl, type, source) {
var shader = gl.createShader(type); var shader = gl.createShader(type);
@ -46,10 +46,13 @@ function main() {
var program = createProgram(gl, vertexShader, fragmentShader); var program = createProgram(gl, vertexShader, fragmentShader);
//clean this msss
positionAttributeLocation = gl.getAttribLocation(program, "a_position"); positionAttributeLocation = gl.getAttribLocation(program, "a_position");
matBuffer = gl.getUniformLocation(program, "mat_thing"); matBuffer = gl.getUniformLocation(program, "mat_thing");
sizeBuffer = gl.getUniformLocation(program, "size_thing"); sizeBuffer = gl.getUniformLocation(program, "size_thing");
distBuffer = gl.getUniformLocation(program, "dist_thing"); distBuffer = gl.getUniformLocation(program, "dist_thing");
fgBuffer = gl.getUniformLocation(program, "is_fg");
vpBuffer = gl.getUniformLocation(program, "mvp_thing");
positionBuffer = gl.createBuffer(); positionBuffer = gl.createBuffer();
@ -57,17 +60,9 @@ function main() {
gl.useProgram(program); gl.useProgram(program);
// Tell the attribute how to get data out of positionBuffer (ARRAY_BUFFER) gl.enable(gl.DEPTH_TEST);
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 gl.depthFunc(gl.LEQUAL);
renderThing();
} }
function renderThing() { function renderThing() {
@ -82,13 +77,23 @@ function renderThing() {
var ratioA = Math.max(ratio, 1); var ratioA = Math.max(ratio, 1);
var ratioB = ratioA / ratio; var ratioB = ratioA / ratio;
// Tell the attribute how to get data out of positionBuffer (ARRAY_BUFFER)
var size = 3; // 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);
var positions = [ var positions = [
-1, -1, -1, -1, -1,
-1, 1, -1, 1, -1,
1, 1, 1, 1, -1,
-1, -1, -1, -1, -1,
1, -1, 1, -1, -1,
1, 1 1, 1, -1
]; ];
gl.enableVertexAttribArray(positionAttributeLocation); gl.enableVertexAttribArray(positionAttributeLocation);
@ -96,23 +101,39 @@ function renderThing() {
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(positions), gl.STATIC_DRAW); gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(positions), gl.STATIC_DRAW);
gl.uniformMatrix4fv(matBuffer, false, new Float32Array([ gl.uniformMatrix4fv(vpBuffer, false, new Float32Array([
ratioB, 0, 0, 0, 256, 0, 0, 0,
0, ratioA, 0, 0, 0, 256, 0, 0,
0, 0, 1, 0, 0, 0, 256 / 4, 0,
0, 0, 0, 1 0, 0, 0, 1
])); ]));
gl.uniformMatrix4fv(matBuffer, false, new Float32Array(MDN.perspectiveMatrix(Math.PI * 100 / 180, ratio, 0.01, 1000)));
hud.textContent = `${Math.floor(nothingness * 100) / 100} nothings; ${Math.floor(nGain * 60 * 100) / 100} nil/sec` hud.textContent = `${Math.floor(nothingness * 100) / 100} nothings; ${Math.floor(nGain * 60 * 100) / 100} nil/sec`
gl.uniform1f(sizeBuffer, -Math.log(nothingness)); gl.uniform1f(sizeBuffer, -Math.log(nothingness));
gl.uniform1f(distBuffer, 0.1 + 3 * nGain/(nGain+nothingness)); gl.uniform1f(distBuffer, 0.1 + 3 * nGain / (nGain + nothingness));
gl.uniform1i(fgBuffer, false);
var primitiveType = gl.TRIANGLES; var primitiveType = gl.TRIANGLES;
var offset = 0; var offset = 0;
var count = 6; var count = 6;
gl.drawArrays(primitiveType, offset, count); gl.drawArrays(primitiveType, offset, count);
requestAnimationFrame(renderThing)
positions = MDN.createCubeData(1, 1, 1);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(positions), gl.STATIC_DRAW);
let vp = MDN.rotateYMatrix(nothingness);
vp = MDN.multiplyMatrices(MDN.translateMatrix(0, 0, -3), vp)
gl.uniformMatrix4fv(vpBuffer, false, new Float32Array(vp));
gl.uniform1i(fgBuffer, true);
count = positions.length / 3;
gl.drawArrays(primitiveType, offset, count);
requestAnimationFrame(renderThing);
} }
let hud = document.querySelector('.hud'); let hud = document.querySelector('.hud');
@ -121,19 +142,19 @@ requestAnimationFrame(renderThing)
let clicking = false; let clicking = false;
setInterval(function() { setInterval(function () {
nothingness += nGain; nothingness += nGain;
},1000 / 60) }, 1000 / 60)
document.body.onclick = async function() { document.body.onclick = async function () {
if (clicking) return; if (clicking) return;
clicking = true; clicking = true;
let oldNGain = nGain; let oldNGain = nGain;
nGain += 0.05; nGain += 0.05;
while (nGain > oldNGain) { while (nGain > oldNGain) {
nGain -= 0.005; nGain -= 0.005;
await new Promise((res) => setTimeout(res,1000 / 60)) await new Promise((res) => setTimeout(res, 1000 / 60))
} }
nGain = oldNGain; nGain = oldNGain;
clicking = false; clicking = false;

285
docs/js/mat.js Normal file
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@ -0,0 +1,285 @@
var MDN = MDN || {};
MDN.matrixArrayToCssMatrix = function (array) {
return "matrix3d(" + array.join(',') + ")";
}
MDN.multiplyPoint = function (matrix, point) {
var x = point[0], y = point[1], z = point[2], w = point[3];
var c1r1 = matrix[ 0], c2r1 = matrix[ 1], c3r1 = matrix[ 2], c4r1 = matrix[ 3],
c1r2 = matrix[ 4], c2r2 = matrix[ 5], c3r2 = matrix[ 6], c4r2 = matrix[ 7],
c1r3 = matrix[ 8], c2r3 = matrix[ 9], c3r3 = matrix[10], c4r3 = matrix[11],
c1r4 = matrix[12], c2r4 = matrix[13], c3r4 = matrix[14], c4r4 = matrix[15];
return [
x*c1r1 + y*c1r2 + z*c1r3 + w*c1r4,
x*c2r1 + y*c2r2 + z*c2r3 + w*c2r4,
x*c3r1 + y*c3r2 + z*c3r3 + w*c3r4,
x*c4r1 + y*c4r2 + z*c4r3 + w*c4r4
];
}
MDN.multiplyMatrices = function (a, b) {
// TODO - Simplify for explanation
// currently taken from https://github.com/toji/gl-matrix/blob/master/src/gl-matrix/mat4.js#L306-L337
var result = [];
var a00 = a[0], a01 = a[1], a02 = a[2], a03 = a[3],
a10 = a[4], a11 = a[5], a12 = a[6], a13 = a[7],
a20 = a[8], a21 = a[9], a22 = a[10], a23 = a[11],
a30 = a[12], a31 = a[13], a32 = a[14], a33 = a[15];
// Cache only the current line of the second matrix
var b0 = b[0], b1 = b[1], b2 = b[2], b3 = b[3];
result[0] = b0*a00 + b1*a10 + b2*a20 + b3*a30;
result[1] = b0*a01 + b1*a11 + b2*a21 + b3*a31;
result[2] = b0*a02 + b1*a12 + b2*a22 + b3*a32;
result[3] = b0*a03 + b1*a13 + b2*a23 + b3*a33;
b0 = b[4]; b1 = b[5]; b2 = b[6]; b3 = b[7];
result[4] = b0*a00 + b1*a10 + b2*a20 + b3*a30;
result[5] = b0*a01 + b1*a11 + b2*a21 + b3*a31;
result[6] = b0*a02 + b1*a12 + b2*a22 + b3*a32;
result[7] = b0*a03 + b1*a13 + b2*a23 + b3*a33;
b0 = b[8]; b1 = b[9]; b2 = b[10]; b3 = b[11];
result[8] = b0*a00 + b1*a10 + b2*a20 + b3*a30;
result[9] = b0*a01 + b1*a11 + b2*a21 + b3*a31;
result[10] = b0*a02 + b1*a12 + b2*a22 + b3*a32;
result[11] = b0*a03 + b1*a13 + b2*a23 + b3*a33;
b0 = b[12]; b1 = b[13]; b2 = b[14]; b3 = b[15];
result[12] = b0*a00 + b1*a10 + b2*a20 + b3*a30;
result[13] = b0*a01 + b1*a11 + b2*a21 + b3*a31;
result[14] = b0*a02 + b1*a12 + b2*a22 + b3*a32;
result[15] = b0*a03 + b1*a13 + b2*a23 + b3*a33;
return result;
}
MDN.multiplyArrayOfMatrices = function (matrices) {
var inputMatrix = matrices[0];
for(var i=1; i < matrices.length; i++) {
inputMatrix = MDN.multiplyMatrices(inputMatrix, matrices[i]);
}
return inputMatrix;
}
MDN.normalMatrix = function (matrix) {
/*
This function takes the inverse and then transpose of the provided
4x4 matrix. The result is a 3x3 matrix. Essentially the translation
part of the matrix gets removed.
https://github.com/toji/gl-matrix
*/
var a00 = matrix[0], a01 = matrix[1], a02 = matrix[2], a03 = matrix[3],
a10 = matrix[4], a11 = matrix[5], a12 = matrix[6], a13 = matrix[7],
a20 = matrix[8], a21 = matrix[9], a22 = matrix[10], a23 = matrix[11],
a30 = matrix[12], a31 = matrix[13], a32 = matrix[14], a33 = matrix[15],
b00 = a00 * a11 - a01 * a10,
b01 = a00 * a12 - a02 * a10,
b02 = a00 * a13 - a03 * a10,
b03 = a01 * a12 - a02 * a11,
b04 = a01 * a13 - a03 * a11,
b05 = a02 * a13 - a03 * a12,
b06 = a20 * a31 - a21 * a30,
b07 = a20 * a32 - a22 * a30,
b08 = a20 * a33 - a23 * a30,
b09 = a21 * a32 - a22 * a31,
b10 = a21 * a33 - a23 * a31,
b11 = a22 * a33 - a23 * a32,
// Calculate the determinant
det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
if (!det) {
return null;
}
det = 1.0 / det;
var result = []
result[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;
result[1] = (a12 * b08 - a10 * b11 - a13 * b07) * det;
result[2] = (a10 * b10 - a11 * b08 + a13 * b06) * det;
result[3] = (a02 * b10 - a01 * b11 - a03 * b09) * det;
result[4] = (a00 * b11 - a02 * b08 + a03 * b07) * det;
result[5] = (a01 * b08 - a00 * b10 - a03 * b06) * det;
result[6] = (a31 * b05 - a32 * b04 + a33 * b03) * det;
result[7] = (a32 * b02 - a30 * b05 - a33 * b01) * det;
result[8] = (a30 * b04 - a31 * b02 + a33 * b00) * det;
return result;
}
MDN.rotateXMatrix = function (a) {
var cos = Math.cos;
var sin = Math.sin;
return [
1, 0, 0, 0,
0, cos(a), -sin(a), 0,
0, sin(a), cos(a), 0,
0, 0, 0, 1
];
}
MDN.rotateYMatrix = function (a) {
var cos = Math.cos;
var sin = Math.sin;
return [
cos(a), 0, sin(a), 0,
0, 1, 0, 0,
-sin(a), 0, cos(a), 0,
0, 0, 0, 1
];
}
MDN.rotateZMatrix = function (a) {
var cos = Math.cos;
var sin = Math.sin;
return [
cos(a), -sin(a), 0, 0,
sin(a), cos(a), 0, 0,
0, 0, 1, 0,
0, 0, 0, 1
];
}
MDN.translateMatrix = function (x, y, z) {
return [
1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
x, y, z, 1
];
}
MDN.scaleMatrix = function (w, h, d) {
return [
w, 0, 0, 0,
0, h, 0, 0,
0, 0, d, 0,
0, 0, 0, 1
];
}
MDN.perspectiveMatrix = function (fieldOfViewInRadians, aspectRatio, near, far) {
// Construct a perspective matrix
/*
Field of view - the angle in radians of what's in view along the Y axis
Aspect Ratio - the ratio of the canvas, typically canvas.width / canvas.height
Near - Anything before this point in the Z direction gets clipped (resultside of the clip space)
Far - Anything after this point in the Z direction gets clipped (outside of the clip space)
*/
var f = 1.0 / Math.tan(fieldOfViewInRadians / 2);
var rangeInv = 1 / (near - far);
return [
f / aspectRatio, 0, 0, 0,
0, f, 0, 0,
0, 0, (near + far) * rangeInv, -1,
0, 0, near * far * rangeInv * 2, 0
];
}
MDN.orthographicMatrix = function(left, right, bottom, top, near, far) {
// Each of the parameters represents the plane of the bounding box
var lr = 1 / (left - right);
var bt = 1 / (bottom - top);
var nf = 1 / (near - far);
var row4col1 = (left + right) * lr;
var row4col2 = (top + bottom) * bt;
var row4col3 = (far + near) * nf;
return [
-2 * lr, 0, 0, 0,
0, -2 * bt, 0, 0,
0, 0, 2 * nf, 0,
row4col1, row4col2, row4col3, 1
];
}
MDN.normalize = function( vector ) {
// A utility function to make a vector have a length of 1
var length = Math.sqrt(
vector[0] * vector[0] +
vector[1] * vector[1] +
vector[2] * vector[2]
)
return [
vector[0] / length,
vector[1] / length,
vector[2] / length
]
}
MDN.invertMatrix = function( matrix ) {
// Adapted from: https://github.com/mrdoob/three.js/blob/master/src/math/Matrix4.js
// Performance note: Try not to allocate memory during a loop. This is done here
// for the ease of understanding the code samples.
var result = [];
var n11 = matrix[0], n12 = matrix[4], n13 = matrix[ 8], n14 = matrix[12];
var n21 = matrix[1], n22 = matrix[5], n23 = matrix[ 9], n24 = matrix[13];
var n31 = matrix[2], n32 = matrix[6], n33 = matrix[10], n34 = matrix[14];
var n41 = matrix[3], n42 = matrix[7], n43 = matrix[11], n44 = matrix[15];
result[ 0] = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44;
result[ 4] = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44;
result[ 8] = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44;
result[12] = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;
result[ 1] = n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44;
result[ 5] = n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44;
result[ 9] = n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44;
result[13] = n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34;
result[ 2] = n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44;
result[ 6] = n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44;
result[10] = n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44;
result[14] = n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34;
result[ 3] = n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43;
result[ 7] = n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43;
result[11] = n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43;
result[15] = n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33;
var determinant = n11 * result[0] + n21 * result[4] + n31 * result[8] + n41 * result[12];
if ( determinant === 0 ) {
throw new Error("Can't invert matrix, determinant is 0");
}
for( var i=0; i < result.length; i++ ) {
result[i] /= determinant;
}
return result;
}