Skip to content

Instantly share code, notes, and snippets.

@robertleeplummerjr

robertleeplummerjr/possible-solution-to-confusing-gpujs-mapped-kernels.js

Last active December 31, 2019 17:44
Show Gist options
  • Save robertleeplummerjr/6ce4e515d08923df20285dfbf5f143f2 to your computer and use it in GitHub Desktop.
Save robertleeplummerjr/6ce4e515d08923df20285dfbf5f143f2 to your computer and use it in GitHub Desktop.
Download ZIP
Raw
possible-solution-to-confusing-gpujs-mapped-kernels.js
const { GPU } = require('gpu.js');
const gpu = new GPU();
// possible solution to confusing kernel maps
const kernel = gpu.createKernel(function(input1, input2) {
const value1 = input1[this.thread.z][this.thread.y][this.thread.x];
const value2 = input1[this.thread.z][this.thread.y][this.thread.x];
/*
up sides:
- You don't have to use gpu.createKernelMap, just gpu.createKernel.
down sides:
- What if I call this.values1.push() twice?
- Where am I in the [z, y, x] coordinates?
- return acts differently than this.values.push();
*/
this.values1.push(value1);
this.values2.push(value2);
}, { output: [3,3,3] });
// another possible solution
const kernel = gpu.createKernel(function(input1, input2) {
const value1 = input1[this.thread.z][this.thread.y][this.thread.x];
const value2 = input1[this.thread.z][this.thread.y][this.thread.x];
/*
up side:
- Super clear about what is going where
- You don't have to use gpu.createKernelMap, just gpu.createKernel.
down sides:
- It looks like I can reference any location, when really `this.values1[this.thread.z][this.thread.y][this.thread.x]` is one long keyword that is a reference point for where we are in the kernel's execution.
- It is crazy long
- Return does not act the same as setting a value
- You CANNOT do `this.values1[this.thread.z + 2][this.thread.y - 1][this.thread.x + 100] = value1` because we can only set the current value
*/
this.values1[this.thread.z][this.thread.y][this.thread.x] = value1;
this.values2[this.thread.z][this.thread.y][this.thread.x] = value2;
}, { output: [3,3,3] });
// another possible solution
const kernel = gpu.createKernel(function(input1, input2) {
const value1 = input1[this.thread.z][this.thread.y][this.thread.x];
const value2 = input1[this.thread.z][this.thread.y][this.thread.x];
/*
up side:
- Simple
- You don't have to use gpu.createKernelMap, just gpu.createKernel.
down sides:
- Where am I in the [z, y, x] coordinates?
- What if I call this.thread.resolve() twice?
- Uses a string for reference, that is lame.
*/
this.thread.resolve('values1', value1);
this.thread.resolve('values2', value2;
}, { output: [3,3,3] });
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment