Bug 12269

Summary: new __gluInvertMatrix() function breaks game "cultivation"
Product: Mesa Reporter: Brice Goglin <brice.goglin>
Component: GLUAssignee: mesa-dev
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: Other   
OS: All   
URL: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=440137
Whiteboard:
i915 platform: i915 features:

Description Brice Goglin 2007-09-03 05:21:29 UTC 
Paul Wise reported in the Debian BTS that the game "cultivation" wasn't reacting correctly anymore.

"When I try to move my gardener, the place it moves to is different to where I clicked. No matter where I click I can't prevent it from moving off the land onto the sea and all the way to the edge of the sea. After a couple of clicks, every click is vertical, towards the top or the bottom of the playing area. Also, defining the plot doesn't seem to work right. Clicking on the controls/buttons for the tutorial and for pause, quit, pick up water, the seeds and so on works fine though. As a result, cultivation is completely unplayable here."

The problem appeared when upgrading Debian libglu1-mesa from 7.0.1-1 (contains upstream 7.0.1) to 7.0.1-2 (contains upstream mesa_7_0_branch up to d69a5961931fcac4b876c55ebfe0189fd11b8d71). I found that the bad commit on mesa_7_0_branch is:

  3069f3484186df09b671c44efdb221f50e5a6a88
  new __gluInvertMatrix() function (Mesa bug 6748)

Reverting it seems to make the problem go away.

Brice
Comment 1 Brian Paul 2007-09-03 15:22:56 UTC 
Fixed in git.  The problem was aliasing between the input and output matrices.

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