playcanvas
Version:
Open-source WebGL/WebGPU 3D engine for the web
81 lines (80 loc) • 1.9 kB
JavaScript
import { BitPacking } from "../../core/math/bit-packing.js";
import { StringIds } from "../../core/string-ids.js";
import {
FUNC_LESSEQUAL,
FUNC_ALWAYS
} from "./constants.js";
const stringIds = new StringIds();
const funcMask = 7;
const funcShift = 0;
const writeShift = 3;
class DepthState {
data = 0;
_depthBias = 0;
_depthBiasSlope = 0;
key = 0;
constructor(func = FUNC_LESSEQUAL, write = true) {
this.func = func;
this.write = write;
}
set test(value) {
this.func = value ? FUNC_LESSEQUAL : FUNC_ALWAYS;
this.updateKey();
}
get test() {
return this.func !== FUNC_ALWAYS;
}
set write(value) {
this.data = BitPacking.set(this.data, value ? 1 : 0, writeShift);
this.updateKey();
}
get write() {
return BitPacking.all(this.data, writeShift);
}
set func(value) {
this.data = BitPacking.set(this.data, value, funcShift, funcMask);
this.updateKey();
}
get func() {
return BitPacking.get(this.data, funcShift, funcMask);
}
set depthBias(value) {
this._depthBias = value;
this.updateKey();
}
get depthBias() {
return this._depthBias;
}
set depthBiasSlope(value) {
this._depthBiasSlope = value;
this.updateKey();
}
get depthBiasSlope() {
return this._depthBiasSlope;
}
copy(rhs) {
this.data = rhs.data;
this._depthBias = rhs._depthBias;
this._depthBiasSlope = rhs._depthBiasSlope;
this.key = rhs.key;
return this;
}
clone() {
const clone = new this.constructor();
return clone.copy(this);
}
updateKey() {
const { data, _depthBias, _depthBiasSlope } = this;
const key = `${data}-${_depthBias}-${_depthBiasSlope}`;
this.key = stringIds.get(key);
}
equals(rhs) {
return this.key === rhs.key;
}
static DEFAULT = Object.freeze(new DepthState());
static NODEPTH = Object.freeze(new DepthState(FUNC_ALWAYS, false));
static WRITEDEPTH = Object.freeze(new DepthState(FUNC_ALWAYS, true));
}
export {
DepthState
};