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8<TITLE>tex-lod</TITLE>
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11<H1 align="left">tex-lod</H1>
12
13<H2>Description</H2>
14<P>This program tests advanced LOD control modes of mipmapped textures such as LOD bias, edge-diagonal-LOD mode, bias clamping, and anisotropic filter. The screen is divided into four sections and it is possible to compare differences by setting parameters for the texture of each section.</P>
15
16<H2>Coverage</H2>
17<TABLE border="1" cellpadding="3" cellspacing="0.1" width="640">
18  <TBODY>
19    <TR>
20<TD width="30%" bgcolor="#C0C0C0"><EM><STRONG>Functions</STRONG></EM></TD>
21<TD width="25%" bgcolor="#C0C0C0"><EM><STRONG>Parameters</STRONG></EM></TD>
22<TD width="45%" bgcolor="#C0C0C0"><EM><STRONG>Description</STRONG></EM></TD>
23    </TR>
24    <TR>
25<TD width="30%" rowspan="5"><A href="../../../gx/Texture/GXInitTexObj.html"><CODE>GXInitTexObj</CODE></A></TD>
26<TD width="25%"><SPAN class="argument">Pointer to image data.</SPAN></TD>
27<TD width="45%">Appropriate value.</TD>
28    </TR>
29    <TR>
30<TD width="25%"><SPAN class="argument">Width and height</SPAN></TD>
31<TD width="45%">Only power of 2 (depends on tpl file)</TD>
32    </TR>
33    <TR>
34<TD width="25%"><SPAN class="argument">format</SPAN></TD>
35<TD width="45%">Some formats (depends on tpl file)</TD>
36    </TR>
37    <TR>
38<TD width="25%"><SPAN class="argument">Wrap mode (s, t)</SPAN></TD>
39<TD width="45%">One or more (depends on tpl file)</TD>
40    </TR>
41    <TR>
42<TD width="25%"><SPAN class="argument">Mipmap</SPAN></TD>
43<TD width="45%">Always <CODE>GX_TRUE</CODE></TD>
44    </TR>
45    <TR>
46<TD width="30%" rowspan="8"><A href="../../../gx/Texture/GXInitTexObjLOD.html"><CODE><CODE>GXInitTexObjLOD</CODE></CODE></A></TD>
47<TD width="25%"><SPAN class="argument">minification filter</SPAN></TD>
48<TD width="45%">Always <CODE>GX_LIN_MIP_LIN</CODE></TD>
49    </TR>
50    <TR>
51<TD width="25%"><SPAN class="argument">Magnification filter</SPAN></TD>
52<TD width="45%">Always <CODE>GX_NEAR</CODE>, <CODE>GX_LINEAR</CODE></TD>
53    </TR>
54    <TR>
55<TD width="25%"><SPAN class="argument">Minimum LOD</SPAN></TD>
56<TD width="45%">Always 0 (depends on tpl file)</TD>
57    </TR>
58    <TR>
59<TD width="25%"><SPAN class="argument">Maximum LOD</SPAN></TD>
60<TD width="45%">Existing values (depends on tpl file)</TD>
61    </TR>
62    <TR>
63<TD width="25%"><SPAN class="argument">LOD bias</SPAN></TD>
64<TD width="45%"><STRONG>Various values.</STRONG></TD>
65    </TR>
66    <TR>
67<TD width="25%"><SPAN class="argument">Bias clamp</SPAN></TD>
68<TD width="45%"><STRONG><CODE>GX_TRUE</CODE> / <CODE>GX_FALSE</CODE></STRONG></TD>
69    </TR>
70    <TR>
71<TD width="25%"><SPAN class="argument">Edge LOD enable</SPAN></TD>
72<TD width="45%"><STRONG><CODE>GX_TRUE</CODE> / <CODE>GX_FALSE</CODE></STRONG></TD>
73    </TR>
74    <TR>
75<TD width="25%"><SPAN class="argument">Anisotropic filter</SPAN></TD>
76<TD width="45%"><STRONG><CODE>GX_ANISO_1</CODE>, <CODE>GX_ANISO_2</CODE>, <CODE>GX_ANISO_4</CODE></STRONG></TD>
77    </TR>
78    <TR>
79<TD width="30%"><A href="../../../gx/Texture/GXLoadTexObj.html"><CODE>GXLoadTexObj</CODE></A></TD>
80<TD width="25%"><SPAN class="argument">Destination texture name.</SPAN></TD>
81<TD width="45%">Always <CODE>GX_TEXMAP0</CODE></TD>
82    </TR>
83    <TR>
84<TD width="30%" rowspan="2"><A href="../../../gx/Tev/GXSetTevOp.html"><CODE>GXSetTevOp</CODE></A></TD>
85<TD width="25%"><SPAN class="argument">TEV stage ID</SPAN></TD>
86<TD width="45%">Always <CODE>GX_TEVSTAGE0</CODE></TD>
87    </TR>
88    <TR>
89<TD width="25%"><SPAN class="argument">Operation mode</SPAN></TD>
90<TD width="45%">Always <CODE>GX_REPLACE</CODE></TD>
91    </TR>
92  </TBODY>
93</TABLE>
94
95<H2>Using the Demo</H2>
96<P>START exits the demo.</P>
97<P>The Control Stick rotates the cube in the selected screen section.<br>The C Stick changes the scale of the cube in the selected screen section.</P>
98<P>X and Y Buttons move the cursor and select a section and a parameter to change.</P>
99<P>L and R Buttons change the value of the selected parameter.</P>
100<P>The A Button rotates or scales all cubes at the same time.</P>
101<P>The B Button changes the texture of all cubes.</P>
102
103<H2>Snapshot</H2>
104<P>Various LOD bias settings.</P>
105<P><IMG src="./images/tex-lod-0.jpg" alt="tex-lod-0.jpg (42351 bytes)" width="640" height="480"></P>
106
107<P>Edge-LOD / Anisotropic filter.</P>
108<P><IMG src="./images/tex-lod-1.jpg" alt="tex-lod-1.jpg (40663 bytes)" width="640" height="480"></P>
109
110<P>Bias clamp.</P>
111<P><IMG src="./images/tex-lod-2.jpg" alt="tex-lod-2.jpg (40607 bytes)" width="640" height="480"></P>
112
113<H2>Data Files Required</H2>
114<P><CODE>$REVOLUTION_SDK_ROOT/dvddata/gxTests/tex-01.tpl</CODE></P>
115
116<H2>Revision History</H2>
117<P>
1182006/03/01 Initial version.<br>
119</P>
120
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