@phaserjs/phaser/components/transform/UpdateWorldTransform.js

Phaser 4

import { TRANSFORM, Transform2DComponent } from "./Transform2DComponent";
import { SetDirtyWorldTransform } from "../dirty/SetDirtyWorldTransform";
import { SetQuadPosition } from "../vertices/SetQuadPosition";
import { WillTransformChildren } from "../permissions/WillTransformChildren";
export function UpdateWorldTransform(id, parentID, cx, cy, cright, cbottom, forceUpdate, parentIsDisplayList) {
  const parentData = Transform2DComponent.data[parentID];
  const data = Transform2DComponent.data[id];
  const pa = parentData[TRANSFORM.WORLD_A];
  const pb = parentData[TRANSFORM.WORLD_B];
  const pc = parentData[TRANSFORM.WORLD_C];
  const pd = parentData[TRANSFORM.WORLD_D];
  const ptx = parentData[TRANSFORM.WORLD_TX];
  const pty = parentData[TRANSFORM.WORLD_TY];
  let a = data[TRANSFORM.LOCAL_A];
  let b = data[TRANSFORM.LOCAL_B];
  let c = data[TRANSFORM.LOCAL_C];
  let d = data[TRANSFORM.LOCAL_D];
  let tx = data[TRANSFORM.LOCAL_TX];
  let ty = data[TRANSFORM.LOCAL_TY];
  data[TRANSFORM.WORLD_A] = a * pa + b * pc;
  data[TRANSFORM.WORLD_B] = a * pb + b * pd;
  data[TRANSFORM.WORLD_C] = c * pa + d * pc;
  data[TRANSFORM.WORLD_D] = c * pb + d * pd;
  data[TRANSFORM.WORLD_TX] = tx * pa + ty * pc + ptx;
  data[TRANSFORM.WORLD_TY] = tx * pb + ty * pd + pty;
  a = data[TRANSFORM.WORLD_A];
  b = data[TRANSFORM.WORLD_B];
  c = data[TRANSFORM.WORLD_C];
  d = data[TRANSFORM.WORLD_D];
  tx = data[TRANSFORM.WORLD_TX];
  ty = data[TRANSFORM.WORLD_TY];
  const x = data[TRANSFORM.FRAME_X1];
  const y = data[TRANSFORM.FRAME_Y1];
  const right = data[TRANSFORM.FRAME_X2];
  const bottom = data[TRANSFORM.FRAME_Y2];
  let x0 = x * a + tx;
  let y0 = y * d + ty;
  let x1 = x * a + tx;
  let y1 = bottom * d + ty;
  let x2 = right * a + tx;
  let y2 = bottom * d + ty;
  let x3 = right * a + tx;
  let y3 = y * d + ty;
  x0 += y * c;
  y0 += x * b;
  x1 += bottom * c;
  y1 += x * b;
  x2 += bottom * c;
  y2 += right * b;
  x3 += y * c;
  y3 += right * b;
  const bx = Math.min(x0, x1, x2, x3);
  const by = Math.min(y0, y1, y2, y3);
  const br = Math.max(x0, x1, x2, x3);
  const bb = Math.max(y0, y1, y2, y3);
  data[TRANSFORM.BOUNDS_X1] = bx;
  data[TRANSFORM.BOUNDS_Y1] = by;
  data[TRANSFORM.BOUNDS_X2] = br;
  data[TRANSFORM.BOUNDS_Y2] = bb;
  const inView = Number(!(cright < bx || cbottom < by || cx > br || cy > bb));
  data[TRANSFORM.IN_VIEW] = inView;
  if (inView === 1 || forceUpdate || parentIsDisplayList) {
    SetQuadPosition(id, x0, y0, x1, y1, x2, y2, x3, y3);
  }
  if (WillTransformChildren(id)) {
    SetDirtyWorldTransform(id);
  }
}