ReactNativeTransformHelper

TransformUtil.js

import MatrixMath from 'react-native/Libraries/Utilities/MatrixMath';

class TransformUtil {

  constructor(matrix) {
    this.matrix = matrix || MatrixMath.createIdentityMatrix();
  }

  perpective(x) {
    MatrixMath.reusePerspectiveCommand(this.matrix, x)

    return this;
  }

  translate(x = 0,y = 0,z = 0) {
    MatrixMath.reuseTranslate3dCommand(this.matrix, x,y,z)

    return this;
  }

  scale(x = 0,y = 0,z = 0) {
    if (!y && !z) {
      y = x;
      z = x;
    }
    MatrixMath.reuseScale3dCommand(this.matrix, x,y,z);

    return this;
  }

  rotate(x = 0, y = 0, z = 0) {
    MatrixMath.reuseRotateXCommand(this.matrix, (Math.PI / 180) * x);
    MatrixMath.reuseRotateYCommand(this.matrix, (Math.PI / 180) * y);
    MatrixMath.reuseRotateZCommand(this.matrix, (Math.PI / 180) * z);

    return this;
  }

  skew(x = 0, y = 0) {
    MatrixMath.reuseSkewXCommand(this.matrix, (Math.PI / 180) * x);
    MatrixMath.reuseSkewYCommand(this.matrix, (Math.PI / 180) * y);
    
    return this;
  }

  origin(x = 0, y = 0, z = 0) {
    const translate = MatrixMath.createIdentityMatrix();
    MatrixMath.reuseTranslate3dCommand(translate, x, y, z);
    MatrixMath.multiplyInto(this.matrix, translate, this.matrix);

    const untranslate = MatrixMath.createIdentityMatrix();
    MatrixMath.reuseTranslate3dCommand(untranslate, -x, -y, -z);
    MatrixMath.multiplyInto(this.matrix, this.matrix, untranslate);

    return this;
  }
}

export function transform(matrix) {
  return new TransformUtil();
}