From 37ca8854f7d1b16f3b561edd8bf19eaf6dd264d2 Mon Sep 17 00:00:00 2001
From: proller <proller@github.com>
Date: Sun, 30 Jun 2013 22:26:01 +0400
Subject: [PATCH] Fix sand, gravel falling stuck
---
src/collision.cpp | 33 ++++++++++++++++++---------------
1 file changed, 18 insertions(+), 15 deletions(-)
diff --git a/src/collision.cpp b/src/collision.cpp
index 3058426eb..df3878f4c 100644
--- a/src/collision.cpp
+++ b/src/collision.cpp
@@ -31,6 +31,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "main.h" // g_profiler
#include "profiler.h"
+// float error is 10 - 9.96875 = 0.03125
+#define COLL_ZERO 0.032
+
// Helper function:
// Checks for collision of a moving aabbox with a static aabbox
// Returns -1 if no collision, 0 if X collision, 1 if Y collision, 2 if Z collision
@@ -41,9 +44,9 @@ int axisAlignedCollision(
{
//TimeTaker tt("axisAlignedCollision");
- f32 xsize = (staticbox.MaxEdge.X - staticbox.MinEdge.X);
- f32 ysize = (staticbox.MaxEdge.Y - staticbox.MinEdge.Y);
- f32 zsize = (staticbox.MaxEdge.Z - staticbox.MinEdge.Z);
+ f32 xsize = (staticbox.MaxEdge.X - staticbox.MinEdge.X) - COLL_ZERO; // reduce box size for solve collision stuck (flying sand)
+ f32 ysize = (staticbox.MaxEdge.Y - staticbox.MinEdge.Y); // - COLL_ZERO; // Y - no sense for falling, but maybe try later
+ f32 zsize = (staticbox.MaxEdge.Z - staticbox.MinEdge.Z) - COLL_ZERO;
aabb3f relbox(
movingbox.MinEdge.X - staticbox.MinEdge.X,
@@ -60,9 +63,9 @@ int axisAlignedCollision(
{
dtime = - relbox.MaxEdge.X / speed.X;
if((relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
- (relbox.MaxEdge.Y + speed.Y * dtime > 0) &&
+ (relbox.MaxEdge.Y + speed.Y * dtime > COLL_ZERO) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
- (relbox.MaxEdge.Z + speed.Z * dtime > 0))
+ (relbox.MaxEdge.Z + speed.Z * dtime > COLL_ZERO))
return 0;
}
else if(relbox.MinEdge.X > xsize)
@@ -76,9 +79,9 @@ int axisAlignedCollision(
{
dtime = (xsize - relbox.MinEdge.X) / speed.X;
if((relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
- (relbox.MaxEdge.Y + speed.Y * dtime > 0) &&
+ (relbox.MaxEdge.Y + speed.Y * dtime > COLL_ZERO) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
- (relbox.MaxEdge.Z + speed.Z * dtime > 0))
+ (relbox.MaxEdge.Z + speed.Z * dtime > COLL_ZERO))
return 0;
}
else if(relbox.MaxEdge.X < 0)
@@ -95,9 +98,9 @@ int axisAlignedCollision(
{
dtime = - relbox.MaxEdge.Y / speed.Y;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
- (relbox.MaxEdge.X + speed.X * dtime > 0) &&
+ (relbox.MaxEdge.X + speed.X * dtime > COLL_ZERO) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
- (relbox.MaxEdge.Z + speed.Z * dtime > 0))
+ (relbox.MaxEdge.Z + speed.Z * dtime > COLL_ZERO))
return 1;
}
else if(relbox.MinEdge.Y > ysize)
@@ -111,9 +114,9 @@ int axisAlignedCollision(
{
dtime = (ysize - relbox.MinEdge.Y) / speed.Y;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
- (relbox.MaxEdge.X + speed.X * dtime > 0) &&
+ (relbox.MaxEdge.X + speed.X * dtime > COLL_ZERO) &&
(relbox.MinEdge.Z + speed.Z * dtime < zsize) &&
- (relbox.MaxEdge.Z + speed.Z * dtime > 0))
+ (relbox.MaxEdge.Z + speed.Z * dtime > COLL_ZERO))
return 1;
}
else if(relbox.MaxEdge.Y < 0)
@@ -130,9 +133,9 @@ int axisAlignedCollision(
{
dtime = - relbox.MaxEdge.Z / speed.Z;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
- (relbox.MaxEdge.X + speed.X * dtime > 0) &&
+ (relbox.MaxEdge.X + speed.X * dtime > COLL_ZERO) &&
(relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
- (relbox.MaxEdge.Y + speed.Y * dtime > 0))
+ (relbox.MaxEdge.Y + speed.Y * dtime > COLL_ZERO))
return 2;
}
//else if(relbox.MinEdge.Z > zsize)
@@ -146,9 +149,9 @@ int axisAlignedCollision(
{
dtime = (zsize - relbox.MinEdge.Z) / speed.Z;
if((relbox.MinEdge.X + speed.X * dtime < xsize) &&
- (relbox.MaxEdge.X + speed.X * dtime > 0) &&
+ (relbox.MaxEdge.X + speed.X * dtime > COLL_ZERO) &&
(relbox.MinEdge.Y + speed.Y * dtime < ysize) &&
- (relbox.MaxEdge.Y + speed.Y * dtime > 0))
+ (relbox.MaxEdge.Y + speed.Y * dtime > COLL_ZERO))
return 2;
}
//else if(relbox.MaxEdge.Z < 0)
--
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