fde55a6f6a
The new version has an API change. Also, up our SDK requirements to be a bit more realistic.
64 lines
1.8 KiB
Dart
64 lines
1.8 KiB
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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part of flutter_sprites;
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/// An node that transforms its children using a 3D perspective projection. This
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/// node type can be used to create 3D flips and other similar effects.
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///
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/// var myNode3D = new Node3D();
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/// myNode3D.rotationY = 45.0;
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/// myNode3D.addChild(new Sprite(myTexture));
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class Node3D extends Node {
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double _rotationX = 0.0;
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/// The node's rotation around the x axis in degrees.
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double get rotationX => _rotationX;
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set rotationX(double rotationX) {
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_rotationX = rotationX;
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invalidateTransformMatrix();
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}
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double _rotationY = 0.0;
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/// The node's rotation around the y axis in degrees.
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double get rotationY => _rotationY;
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set rotationY(double rotationY) {
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_rotationY = rotationY;
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invalidateTransformMatrix();
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}
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double _projectionDepth = 500.0;
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/// The projection depth. Default value is 500.0.
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double get projectionDepth => _projectionDepth;
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set projectionDepth(double projectionDepth) {
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_projectionDepth = projectionDepth;
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invalidateTransformMatrix();
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}
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@override
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Matrix4 computeTransformMatrix() {
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// Apply normal 2d transforms
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Matrix4 matrix = super.computeTransformMatrix();
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// Apply perspective projection
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Matrix4 projection = new Matrix4(1.0, 0.0, 0.0, 0.0,
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0.0, 1.0, 0.0, 0.0,
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0.0, 0.0, 1.0, -1.0/_projectionDepth,
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0.0, 0.0, 0.0, 1.0);
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matrix.multiply(projection);
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// Rotate around x and y axis
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matrix.rotateY(radians(_rotationY));
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matrix.rotateX(radians(_rotationX));
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return matrix;
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}
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}
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