flutter/flame
1
0
Fork 0
mirror of https://github.com/flame-engine/flame.git synced 2025-11-03 04:18:25 +08:00
Code Issues Packages Projects Releases Wiki Activity

move prepare canvas to position component

Browse Source
This commit is contained in:
feroult
2017-11-15 16:27:30 -02:00
parent 84014a5591
commit a0e24f7a0a
1 changed files with 12 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
lib/component.dart
View File

@ -12,9 +12,7 @@ abstract class Component {
}
abstract class PositionComponent extends Component {
double x = 0.0,
y = 0.0,
angle = 0.0;
double x = 0.0, y = 0.0, angle = 0.0;
double angleBetween(PositionComponent c) {
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) {
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 {
double width, height;
Image image;
final Paint paint = new Paint()
..color = new Color(0xffffffff);
final Paint paint = new Paint()..color = new Color(0xffffffff);
SpriteComponent.square(double size, String imagePath)
: this.rectangle(size, size, imagePath);
@ -43,26 +45,21 @@ abstract class SpriteComponent extends PositionComponent {
render(Canvas canvas) {
if (image != null) {
_prepareCanvas(canvas);
prepareCanvas(canvas);
_drawImage(canvas);
}
}
void _prepareCanvas(Canvas canvas) {
canvas.translate(x, y);
canvas.rotate(angle); // TODO: rotate around center
}
void _drawImage(Canvas canvas) {
final Rect outputRect = new Rect.fromLTWH(0.0, 0.0, width, height);
final Size imageSize =
new Size(image.width.toDouble(), image.height.toDouble());
new Size(image.width.toDouble(), image.height.toDouble());
final FittedSizes sizes =
applyBoxFit(BoxFit.cover, imageSize, outputRect.size);
applyBoxFit(BoxFit.cover, imageSize, outputRect.size);
final Rect inputSubrect =
Alignment.center.inscribe(sizes.source, Offset.zero & imageSize);
Alignment.center.inscribe(sizes.source, Offset.zero & imageSize);
final Rect outputSubrect =
Alignment.center.inscribe(sizes.destination, outputRect);
Alignment.center.inscribe(sizes.destination, outputRect);
canvas.drawImageRect(image, inputSubrect, outputSubrect, paint);
}