Materials (Metroid Prime): Difference between revisions

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Revision as of 01:18, 26 January 2015

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>Aruki

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 === Material Animations ===
+The material animations section immediately follows the texgen flags. It starts with this short header:
+{| class="wikitable"
+! Offset
+! Size
+! Description
+|-
+| 0x0
+| 4
+| '''Material animations section size''' (includes animation count, so will be 4 at minimum)
+|-
+| 0x4
+| 4
+| '''Animation count'''
+|}
+The structure of the animations themselves is somewhat simple. Each animation has a 32-bit ''mode'' setting, followed by a number of float parameters. The number and usage of these float parameters varies depending on what mode is set. There are 7 possible modes, but only 2-5 are known.
+For all of the following modes, let ''s'' be equal to ''seconds mod 900''.
+==== Mode 2: UV Offset ====
+This mode is used to scroll both U and V at the same time. It has four float parameters: ''offsetA'', ''offsetB'', ''scaleA'', and ''scaleB''.
+<pre>uOffset = (s * scaleA) + offsetA;
+vOffset = (s * scaleB) + offsetB;</pre>
+==== Mode 3: Rotation ====
+This mode rotates the material. It has two float parameters: ''offset'' and ''scale''.
+<pre>angle = (s * scale) + offset;</pre>
+The material is then rotated by ''angle'' degrees.
+==== Mode 4/5: U/V Offset ====
+This mode can be used to scroll U and V independently from each other. It has four float parameters. The offset calculation for these modes is unknown; however, the same code is used for both modes, with the only difference being whether the calculated offset is applied to U or V.
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 [[Category:Metroid Prime]]
 [[Category:Metroid Prime 2: Echoes]]