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move prepare canvas to position component

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feroult
2017-11-15 16:27:30 -02:00
parent 84014a5591
commit a0e24f7a0a
1 changed files with 12 additions and 15 deletions
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27
lib/component.dart
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@ -12,9 +12,7 @@ abstract class Component {
} }
abstract class PositionComponent extends Component { abstract class PositionComponent extends Component {
double x = 0.0, double x = 0.0, y = 0.0, angle = 0.0;
y = 0.0,
angle = 0.0;
double angleBetween(PositionComponent c) { double angleBetween(PositionComponent c) {
return (atan2(c.x - this.x, this.y - c.y) - PI / 2) % (2 * PI); return (atan2(c.x - this.x, this.y - c.y) - PI / 2) % (2 * PI);
@ -23,14 +21,18 @@ abstract class PositionComponent extends Component {
double distance(PositionComponent c) { double distance(PositionComponent c) {
return sqrt(pow(this.y - c.y, 2) + pow(this.x - c.x, 2)); return sqrt(pow(this.y - c.y, 2) + pow(this.x - c.x, 2));
} }
void prepareCanvas(Canvas canvas) {
canvas.translate(x, y);
canvas.rotate(angle); // TODO: rotate around center
}
} }
abstract class SpriteComponent extends PositionComponent { abstract class SpriteComponent extends PositionComponent {
double width, height; double width, height;
Image image; Image image;
final Paint paint = new Paint() final Paint paint = new Paint()..color = new Color(0xffffffff);
..color = new Color(0xffffffff);
SpriteComponent.square(double size, String imagePath) SpriteComponent.square(double size, String imagePath)
: this.rectangle(size, size, imagePath); : this.rectangle(size, size, imagePath);
@ -43,26 +45,21 @@ abstract class SpriteComponent extends PositionComponent {
render(Canvas canvas) { render(Canvas canvas) {
if (image != null) { if (image != null) {
_prepareCanvas(canvas); prepareCanvas(canvas);
_drawImage(canvas); _drawImage(canvas);
} }
} }
void _prepareCanvas(Canvas canvas) {
canvas.translate(x, y);
canvas.rotate(angle); // TODO: rotate around center
}
void _drawImage(Canvas canvas) { void _drawImage(Canvas canvas) {
final Rect outputRect = new Rect.fromLTWH(0.0, 0.0, width, height); final Rect outputRect = new Rect.fromLTWH(0.0, 0.0, width, height);
final Size imageSize = final Size imageSize =
new Size(image.width.toDouble(), image.height.toDouble()); new Size(image.width.toDouble(), image.height.toDouble());
final FittedSizes sizes = final FittedSizes sizes =
applyBoxFit(BoxFit.cover, imageSize, outputRect.size); applyBoxFit(BoxFit.cover, imageSize, outputRect.size);
final Rect inputSubrect = final Rect inputSubrect =
Alignment.center.inscribe(sizes.source, Offset.zero & imageSize); Alignment.center.inscribe(sizes.source, Offset.zero & imageSize);
final Rect outputSubrect = final Rect outputSubrect =
Alignment.center.inscribe(sizes.destination, outputRect); Alignment.center.inscribe(sizes.destination, outputRect);
canvas.drawImageRect(image, inputSubrect, outputSubrect, paint); canvas.drawImageRect(image, inputSubrect, outputSubrect, paint);
} }