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More methods for converting and handling tile/fine/full coordinates.

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git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2263 542714f4-19e9-0310-aa3c-eee0fc999fb1
This commit is contained in:
Michael Bayne
2003-02-12 05:36:18 +00:00
parent 5dbc4ba8f8
commit c19bc45e29
1 changed files with 40 additions and 3 deletions
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src/java/com/threerings/miso/client/util/IsoUtil.java
+40 -3
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@@ -1,5 +1,5 @@
//
// $Id: IsoUtil.java,v 1.44 2003/02/04 03:11:13 mdb Exp $
// $Id: IsoUtil.java,v 1.45 2003/02/12 05:36:18 mdb Exp $
package com.threerings.miso.client.util;
@@ -451,8 +451,16 @@ public class IsoUtil
*/
public static int fineToFull (IsoSceneViewModel model, int fine)
{
return (fine / model.finegran) * FULL_TILE_FACTOR +
(fine % model.finegran);
return toFull(fine / model.finegran, fine % model.finegran);
}
/**
* Composes the supplied tile coordinate and fine coordinate offset
* into a full coordinate.
*/
public static int toFull (int tile, int fine)
{
return tile * FULL_TILE_FACTOR + fine;
}
/**
@@ -519,6 +527,35 @@ public class IsoUtil
return poly;
}
/**
* Adds the supplied fine coordinates to the supplied tile coordinates
* to compute full coordinates.
*
* @retun the point object supplied as <code>full</code>.
*/
public static Point tilePlusFineToFull (IsoSceneViewModel model,
int tileX, int tileY,
int fineX, int fineY,
Point full)
{
int dtx = fineX / model.finegran;
int dty = fineY / model.finegran;
int fx = fineX - dtx * model.finegran;
if (fx < 0) {
dtx--;
fx += model.finegran;
}
int fy = fineY - dty * model.finegran;
if (fy < 0) {
dty--;
fy += model.finegran;
}
full.x = toFull(tileX + dtx, fx);
full.y = toFull(tileY + dty, fy);
return full;
}
/**
* Turns x and y scene coordinates into an integer key.
*