Changes between Initial Version and Version 1 of UserGuide/Develop/FileFormats/IFF

Timestamp:

Feb 2, 2018, 12:37:53 AM (6 years ago)

Author:

Thomas Bernard

Comment:

--

UserGuide/Develop/FileFormats/IFF

@@ +1 @@
+* [https://en.wikipedia.org/wiki/ILBM]
+* [http://wiki.amigaos.net/wiki/ILBM_IFF_Interleaved_Bitmap]
+
+Chunk DPPV :
+
+{{{
+/* The chunk identifier DPPV */
+
+#define ID_DPPV    MakeID('D','P','P','V')
+
+typedef LONG LongFrac;
+typedef struct ( LongFrac x,y,z; )  LFPoint;
+typedef LongFrac  APoint[3];
+
+typedef union {
+   LFPoint l;
+   APoint  a;
+   } UPoint;
+
+/* values taken by variable rotType */
+#define ROT_EULER  0
+#define ROT_INCR   1
+
+/* Disk record describing Perspective state */
+
+typedef struct {
+   WORD     rotType;           /* rotation type */
+   WORD     iA, iB, iC;        /* rotation angles (in degrees) */
+   LongFrac Depth;             /* perspective depth */
+   WORD     uCenter, vCenter;  /* coords of center perspective,
+                                * relative to backing bitmap,
+                                * in Virtual coords
+                                */
+   WORD     fixCoord;          /* which coordinate is fixed */
+   WORD     angleStep;         /* large angle stepping amount */
+   UPoint   grid;              /* gridding spacing in X,Y,Z */
+   UPoint   gridReset;         /* where the grid goes on Reset */
+   UPoint   gridBrCenter;      /* Brush center when grid was last on,
+                                * as reference point
+                                */
+   UPoint   permBrCenter;      /* Brush center the last time the mouse
+                                * button was clicked, a rotation performed,
+                                * or motion along "fixed" axis
+                                */
+   LongFrac rot[3][3];         /* rotation matrix */
+   } PerspState;
+
+}}}