docs: document another viewperf bug in Maya-03

This commit is contained in:
Brian Paul
2012-04-13 14:31:16 -06:00
parent f2509df95c
commit 286e50a87d

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@@ -152,7 +152,38 @@ If the fallback texture created in _mesa_get_fallback_texture() is
initialized to be full white instead of full black the rendering appears initialized to be full white instead of full black the rendering appears
correct. correct.
However, we have no plans to implement this work-around in Mesa. However, we have no plans to implement this work-around in Mesa.
</p>
<h2>Maya-03 test 2</h2>
<p>
This test makes some unusual calls to glRotate. For example:
</p>
<pre>
glRotate(50, 50, 50, 1);
glRotate(100, 100, 100, 1);
glRotate(52, 52, 52, 1);
</pre>
<p>
These unusual values lead to invalid modelview matrices.
For example, the last glRotate command above produces this matrix with Mesa:
<pre>
1.08536e+24 2.55321e-23 -0.000160389 0
5.96937e-25 1.08536e+24 103408 0
103408 -0.000160389 1.74755e+09 0
0 0 0 nan
</pre>
and with NVIDIA's OpenGL:
<pre>
1.4013e-45 0 -nan 0
0 1.4013e-45 1.4013e-45 0
1.4013e-45 -nan 1.4013e-45 0
0 0 0 1.4013e-45
</pre>
<p>
This causes the object in question to be drawn in a strange orientation
and with a semi-random color (between white and black) since GL_FOG is enabled.
</p> </p>