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@@ -0,0 +1,85 @@ |
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package se.mah.ag4431.badonkatrunkandroid.View; |
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import android.graphics.PointF; |
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import android.graphics.RectF; |
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public class Viewport { |
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private PointF currentViewportWorldCentre; |
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private RectF convertedRect; |
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private PointF convertedPoint; |
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private int pixelsPerMetreX; |
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private int pixelsPerMetreY; |
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//private int screenXResolution; |
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//private int screenYResolution; |
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private int screenCentreX; |
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private int screenCentreY; |
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private int metresToShowX; |
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private int metresToShowY; |
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Viewport(int screenXResolution, int screenYResolution){ |
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screenCentreX = screenXResolution / 2; |
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screenCentreY = screenYResolution / 2; |
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pixelsPerMetreX = screenXResolution / 90; |
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pixelsPerMetreY = screenYResolution / 55; |
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metresToShowX = 92; |
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metresToShowY = 57; |
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convertedRect = new RectF(); |
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convertedPoint = new PointF(); |
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currentViewportWorldCentre = new PointF(); |
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} |
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void setWorldCentre(float x, float y){ |
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currentViewportWorldCentre.x = x; |
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currentViewportWorldCentre.y = y; |
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} |
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public RectF worldToScreen(float objectX, float objectY, float objectWidth, float objectHeight){ |
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int left = (int) (screenCentreX - ((currentViewportWorldCentre.x - objectX) * pixelsPerMetreX)); |
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int top = (int) (screenCentreY - ((currentViewportWorldCentre.y - objectY) * pixelsPerMetreY)); |
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int right = (int) (left + (objectWidth * pixelsPerMetreX)); |
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int bottom = (int) (top + (objectHeight * pixelsPerMetreY)); |
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convertedRect.set(left, top, right, bottom); |
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return convertedRect; |
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} |
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public PointF worldToScreenPoint(float objectX, float objectY){ |
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int left = (int) (screenCentreX - ((currentViewportWorldCentre.x - objectX) * pixelsPerMetreX)); |
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int top = (int) (screenCentreY - ((currentViewportWorldCentre.y - objectY) * pixelsPerMetreY)); |
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//Log.d("vp left=",""+left); |
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//Log.d("vp top=",""+top); |
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convertedPoint.x = left; |
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convertedPoint.y = top; |
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return convertedPoint; |
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} |
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public boolean clipObjects(float objectX, float objectY, float objectWidth, float objectHeight) { |
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boolean clipped = true; |
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if (objectX - objectWidth < currentViewportWorldCentre.x + (metresToShowX / 2)) { |
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if (objectX + objectWidth> currentViewportWorldCentre.x - (metresToShowX / 2)) { |
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if (objectY - objectHeight< currentViewportWorldCentre.y + (metresToShowY / 2)) { |
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if (objectY + objectHeight > currentViewportWorldCentre.y - (metresToShowY / 2)){ |
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clipped = false; |
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} |
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} |
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} |
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} |
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return clipped; |
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} |
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public void moveRight() { |
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currentViewportWorldCentre.x += 0.1f; |
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} |
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} |
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