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box fit for sprite components

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feroult
2017-11-14 14:34:21 -02:00
parent 2f35a82614
commit 266e85ce7c
1 changed files with 27 additions and 11 deletions
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38
lib/component.dart
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@ -1,20 +1,25 @@
import 'dart:ui';
import 'dart:math'; import 'dart:math';
import 'dart:ui';
import 'package:flutter/painting.dart';
import 'flame.dart'; import 'flame.dart';
abstract class Component { abstract class Component {
void update(double t); void update(double t);
void render(Canvas c); void render(Canvas c);
} }
abstract class PositionComponent extends Component { abstract class PositionComponent extends Component {
double x, y, angle; double x = 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);
} }
double distance(PositionComponent c) { double distance(PositionComponent c) {
@ -28,22 +33,33 @@ abstract class SpriteComponent extends PositionComponent {
double width, height; double width, height;
Image image; 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); SpriteComponent.square(double size, String imagePath)
: this.rectangle(size, size, imagePath);
SpriteComponent.rectangle(this.width, this.height, String imagePath) { SpriteComponent.rectangle(this.width, this.height, String imagePath) {
Flame.images.load(imagePath).then((image) { this.image = image; }); Flame.images.load(imagePath).then((image) {
this.image = image;
});
} }
render(Canvas canvas) { render(Canvas canvas) {
canvas.translate(x, y); canvas.translate(x, y);
canvas.rotate(PI/2 + angle); canvas.rotate(angle); // TODO: rotate around center
canvas.translate(-width/2, -height/2);
if (image != null) { if (image != null) {
Rect src = new Rect.fromLTWH(0.0, 0.0, image.width.toDouble(), image.height.toDouble()); final Rect outputRect = new Rect.fromLTWH(0.0, 0.0, width, height);
Rect dst = new Rect.fromLTWH(0.0, 0.0, width, height);
canvas.drawImageRect(image, src, dst, paint); final Size imageSize = new Size(
image.width.toDouble(), image.height.toDouble());
final FittedSizes sizes = applyBoxFit(
BoxFit.fill, imageSize, outputRect.size);
final Rect inputSubrect = Alignment.center.inscribe(
sizes.source, Offset.zero & imageSize);
final Rect outputSubrect = Alignment.center.inscribe(
sizes.destination, outputRect);
canvas.drawImageRect(image, inputSubrect, outputSubrect, paint);
} }
} }