1 #include <math.h>

2 #include <stdio.h>

3 #include "main.h"

4

5 unsigned short draculin[128 * 128];

6

7 void InitRotozoomer()

8 {

9 unsigned short dracol[256];

10

11 FILE *dracdata;

12 dracdata=fopen("draculf.bin","rb");

13

14 int x0=fgetc(dracdata);

15 int y0=fgetc(dracdata);

16

17 int r,g,b;

18 for (int i=0;i<256;i++)

19 dracol[i]=(((fgetc(dracdata)>>1)<<11) | (fgetc(dracdata)<<5) | (fgetc(dracdata))>>1);

20

21 for (int y=0;y<y0;y++)

22 for (int x=0;x<x0;x++)

23 draculin[(y<<7) + x]=dracol[fgetc(dracdata)];

24

25 fclose(dracdata);

26 }

27

28 void RunRotozoomer(float rot, float zoom, unsigned short *vram)

29 {

30 int fp = 16;

31

32 int mx = 0, my = 0, mmx = 50<<fp, mmy = 20<<fp;

33 int dx = (int)((cos(rot/d2r)*zoom) * pow(2,fp));

34 int dy = (int)((sin(rot/d2r)*zoom) * pow(2,fp));

35

36 int x,y;

37 unsigned short c;

38

39 for (y=0; y<ScreenHeight; y++)

40 {

41 mmx = mmx - dy;

42 mmy = mmy + dx;

43 mx = mmx;

44 my = mmy;

45 for (x=0; x<ScreenWidth; x++)

46 {

47 mx = mx + dx;

48 my = my + dy;

49 c = draculin[((mx>>fp)&127) + (((my>>fp)&127) << 7)];

50 *vram++=c;

51 }

52 }

53 }

54

55 void RunRotozoomerNormal(int ntime, unsigned short *vram)

56 {

57 float rot = sin(ntime/478.0f) * 280.0f;

58 float zoom = sin(ntime/227.0f)*0.75f + 0.76f;

59

60 RunRotozoomer(rot, zoom, vram);

61 }

62

63 void RunRotozoomerNear(int ntime, unsigned short *vram)

64 {

65 float rot = sin(ntime/478.0f) * 280.0f;

66 float zoom = 0.05f;

67

68 RunRotozoomer(rot, zoom, vram);

69 }

70

71 void RunRotozoomerFar(int ntime, unsigned short *vram)

72 {

73 float rot = sin(ntime/478.0f) * 280.0f;

74 float zoom = 8.0f;

75

76 RunRotozoomer(rot, zoom, vram);

77 }