void RenderNode::updateMatrix()

in skiko/src/commonMain/cpp/common/node/RenderNode.cpp [269:304]

• 34 lines of code
• 5 McCabe index (conditional complexity)

void RenderNode::updateMatrix() {
    if (!this->matrixDirty) {
        return;
    }
    float pivotX, pivotY;
    if (this->pivot.isFinite()) {
        pivotX = this->pivot.fX;
        pivotY = this->pivot.fY;
    } else {
        pivotX = this->bounds.width() / 2.0f;
        pivotY = this->bounds.height() / 2.0f;
    }
    this->transformMatrix.reset();
    if (isZero(this->rotationX) && isZero(this->rotationY)) {
        this->transformMatrix.setTranslate(this->translationX, this->translationY);
        this->transformMatrix.preRotate(this->rotationZ, pivotX, pivotY);
        this->transformMatrix.preScale(this->scaleX, this->scaleY, pivotX, pivotY);
    } else {
        this->transformMatrix.preScale(this->scaleX, this->scaleY, pivotX, pivotY);

        SkM44 transform3D;
        transform3D.preConcat(SkM44::Rotate({1, 0, 0}, -this->rotationX * SK_ScalarPI / 180));
        transform3D.preConcat(SkM44::Rotate({0,-1, 0}, -this->rotationY * SK_ScalarPI / 180));
        transform3D.preConcat(SkM44::Rotate({0, 0, 1}, -this->rotationZ * SK_ScalarPI / 180));
        SkPatch3D patch3D;
        patch3D.transform(transform3D);

        SkMatrix transform;
        this->transformCamera.patchToMatrix(patch3D, &transform);
        transform.preTranslate(-pivotX, -pivotY);
        transform.postTranslate(pivotX + this->translationX, pivotY + this->translationY);
        this->transformMatrix.postConcat(transform);
    }
    this->matrixDirty = false;
    this->matrixIdentity = this->transformMatrix.isIdentity();
}