Which render path playcanvas using?

ccandy · February 15, 2022, 10:34pm

forward+? forward? or deferred rendering

Leonidas · February 15, 2022, 10:39pm

Hi @ccandy and welcome,

It’s using forward rendering, here is the source code of the relevant class in the engine:

playcanvas/engine/blob/dev/src/scene/renderer/forward-renderer.js

import { now } from '../../core/time.js';
import { Debug } from '../../core/debug.js';

import { Mat3 } from '../../math/mat3.js';
import { Mat4 } from '../../math/mat4.js';
import { Vec3 } from '../../math/vec3.js';

import { BoundingSphere } from '../../shape/bounding-sphere.js';

import {
    BUFFER_DYNAMIC,
    CLEARFLAG_COLOR, CLEARFLAG_DEPTH, CLEARFLAG_STENCIL,
    CULLFACE_BACK, CULLFACE_FRONT, CULLFACE_FRONTANDBACK, CULLFACE_NONE,
    FUNC_ALWAYS, FUNC_LESSEQUAL,
    SEMANTIC_ATTR,
    STENCILOP_KEEP
} from '../../graphics/constants.js';
import { VertexBuffer } from '../../graphics/vertex-buffer.js';
import { VertexFormat } from '../../graphics/vertex-format.js';
import { DebugGraphics } from '../../graphics/debug-graphics.js';

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ccandy · February 15, 2022, 10:41pm

Thanks @Leonidas

Since I am new to web base game development.

I am wondering is that possible to develop deferred rendering in web-game engine?

Thanks

yaustar · February 15, 2022, 10:45pm

It’s believe it is possible and I think three.js had it at one point but I think they’ve deprecated it though.

ccandy · February 15, 2022, 11:02pm

I am interesting in is any solution to render multiple lights in playcanvas?

Leonidas · February 15, 2022, 11:05pm

You are quite lucky on this, PlayCanvas is the first WebGL engine that offers a robust implementation of clustered lighting. Meaning you can render multiple lights with minimal performance cost.

Here is an example:

https://playcanvas.github.io/#/graphics/clustered-lighting

mvaligursky · February 16, 2022, 8:56am

when you use clustered lighting, it’s forward+

ccandy · February 16, 2022, 6:48pm

well, yes or no, there also cluster deferred lighting. cluster only meaning you cut light volume into cluster and maintain light list. you can also create g buffer and do deferred lighting.

mvaligursky · February 16, 2022, 8:21pm

well sure . but playcanvas is a forward engine as was mentioned early on … when you add clustered lighting, that does not change.