@tolokoban/tgd
Version:
ToloGameDev library for WebGL2
81 lines • 5.94 kB
JavaScript
import { TgdPainterProgram } from "./../../program.js";
import { TgdUniformBufferObject } from "./../../../uniform/index.js";
import { RED, GREEN, BLUE } from "./consts.js";
import { TgdColor } from "./../../../color/index.js";
import { TgdVec2 } from "./../../../math/index.js";
export class PainterAxes extends TgdPainterProgram {
constructor(context, { uniformCamera, size, red = RED, green = GREEN, blue = BLUE }) {
const R = parseColor(red);
const G = parseColor(green);
const B = parseColor(blue);
const uniformPixels = new TgdUniformBufferObject(context, {
uniforms: {
uniPixels: "vec2",
},
});
const uniPixels = new TgdVec2();
super(context, {
drawMode: "TRIANGLE_STRIP",
uniforms: {
uniformCamera,
uniformPixels,
},
varying: {
varColor: "vec4",
},
dataset: [
{
attribs: {
attPos: {
type: "vec2",
data: new Float32Array([+1, 0, +1, +1, -1, 0, -1, +1]),
},
},
},
{
divisor: 1,
attribs: {
attVec: {
type: "vec3",
data: new Float32Array([1, 0, 0, 0, 1, 0, 0, 0, 1]),
},
attCol: {
type: "vec3",
data: new Float32Array([...R, ...G, ...B]),
},
},
},
],
vert: {
mainCode: [
"varColor = vec4(attCol, 1.0);",
"vec4 point = uniProjectionMatrix * uniModelViewMatrix * vec4(attVec, 1.0);",
"vec2 radial = normalize(vec2(-point.y, point.x)) * uniPixels * point.w;",
"point.xy *= attPos.y;",
"point.xy += radial * attPos.x;",
"gl_Position = point;",
],
},
frag: {
mainCode: ["FragColor = varColor;"],
},
state: {
depth: "off",
blend: "off",
cull: "off",
},
onEnter: () => {
const thickness = this.size / 64;
uniPixels.x = thickness / this.size;
uniPixels.y = uniPixels.x;
uniformPixels.values.uniPixels = uniPixels;
},
});
this.size = size;
}
}
function parseColor(colorCSS) {
const color = TgdColor.fromString(colorCSS);
return [color.R, color.G, color.B];
}
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