	4b825dc642cb6eb9a060e54bf8d69288fbee4904		94a6641b73026d662261604d7d192beae70b11dc
		1	#include "system.h"
		2	#include "prototyp.h"
		3
		4	void UpdateMorphing(MORPHCTRL *mcptr)
		5	{
		6	MORPHHEADER *mhdr = mcptr->ObMorphHeader;
		7	int UpdateRate;
		8
		9	/printf("UpdateMorphing\n");/
		10
		11	if(mcptr->ObMorphFlags & mph_flag_play)
		12	{
		13	/* How fast? */
		14
		15	UpdateRate = (mcptr->ObMorphSpeed == ONE_FIXED) ? NormalFrameTime : MUL_FIXED(NormalFrameTime, mcptr->ObMorphSpeed);
		16
		17	/* Update the current frame */
		18
		19	if(mcptr->ObMorphFlags & mph_flag_reverse)
		20	{
		21	mcptr->ObMorphCurrFrame -= UpdateRate;
		22
		23	if(mcptr->ObMorphCurrFrame < 0)
		24	{
		25	if(mcptr->ObMorphFlags & mph_flag_noloop)
		26	{
		27	mcptr->ObMorphCurrFrame = 0;
		28
		29	/* The sequence has finished and we are at the start */
		30
		31	mcptr->ObMorphFlags \|= (mph_flag_finished \| mph_flag_start);
		32	}
		33	else
		34	{
		35	mcptr->ObMorphCurrFrame += mhdr->mph_maxframes;
		36
		37	/* The sequence has looped and we are back at the end */
		38
		39	mcptr->ObMorphFlags \|= (mph_flag_looped \| mph_flag_end);
		40	}
		41	}
		42	}
		43	else
		44	{
		45	mcptr->ObMorphCurrFrame += UpdateRate;
		46
		47	if(mcptr->ObMorphCurrFrame >= mhdr->mph_maxframes)
		48	{
		49	if(mcptr->ObMorphFlags & mph_flag_noloop)
		50	{
		51	/* The sequence has finished and we are at the end */
		52
		53	mcptr->ObMorphFlags \|= (mph_flag_finished \| mph_flag_end);
		54
		55	mcptr->ObMorphCurrFrame = mhdr->mph_maxframes - 1;
		56	}
		57	else
		58	{
		59	mcptr->ObMorphCurrFrame -= mhdr->mph_maxframes;
		60
		61	/* The sequence has looped and we are back at the start */
		62
		63	mcptr->ObMorphFlags \|= (mph_flag_looped \| mph_flag_start);
		64	}
		65
		66	}
		67	}
		68	}
		69	}
		70
		71	/*
		72
		73	Using the current frame, calculate the lerp values and find out which two
		74	shapes to interpolate between.
		75
		76	Write this information back to a MORPHDISPLAY structure.
		77
		78	*/
		79
		80	void GetMorphDisplay(MORPHDISPLAY md, DISPLAYBLOCK dptr)
		81	{
		82	MORPHFRAME *mdata;
		83	MORPHCTRL *mc = dptr->ObMorphCtrl;
		84	MORPHHEADER *mhdr = mc->ObMorphHeader;
		85
		86	md->md_lerp = mc->ObMorphCurrFrame & 0xffff;
		87
		88	mdata = mhdr->mph_frames;
		89	mdata = &mdata[mc->ObMorphCurrFrame >> 16];
		90
		91	md->md_shape1 = mdata->mf_shape1;
		92	md->md_shape2 = mdata->mf_shape2;
		93
		94	md->md_sptr1 = GetShapeData(md->md_shape1);
		95	md->md_sptr2 = GetShapeData(md->md_shape2);
		96	}