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- DPaint perspective chunk (EA)
-
- IFF FORM / CHUNK DESCRIPTION
- ============================
-
- Form/Chunk ID: Chunk DPPV (DPaint II ILBM perspective chunk)
- Date Submitted: 12/86
- Submitted by: Dan Silva
-
- Chunk Description:
-
- The DPPV chunk describes the perspective state in a DPaintII ILBM.
-
- Chunk Spec:
-
- /* 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;
-
- SUPPORTING SOFTWARE
- ===================
- DPaint II by Dan Silva for Electronic Arts
-
-
-