230 lines
7.5 KiB
C
230 lines
7.5 KiB
C
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#include <math.h>
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#include <SDL/SDL_timer.h>
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#include "ZeDemo.h"
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#include "effects.h"
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#include "precalcs.h"
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#include "engine3d.h"
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#define SWAP8(x) ( (((x) >> 4) & 0x0F) | (((x) << 4) & 0xF0) )
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#define SWAP16(x) ( (((x) >> 8) & 0x00FF) | (((x) << 8) & 0xFF00) )
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#define SWAP32(x)( (((x) >> 24) & 0x000000FF) | (((x) >> 8) & 0x0000FF00) | (((x) << 8) & 0x00FF0000) | (((x) << 24) & 0xFF000000) )
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extern unsigned int fsin1[2048], fsin2[2048], fsin3[2048];
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extern int prticks;
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extern unsigned short sky1[];
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extern unsigned short sky2[];
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short floorstuff[2*WIDTH*HEIGHT];
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unsigned char dist_angle[2*WIDTH*HEIGHT];
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extern unsigned char rbmp[SSIZE];
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extern unsigned char gbmp[SSIZE];
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extern unsigned char bbmp[SSIZE];
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extern unsigned char rbuffer[SSIZE];
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extern unsigned char gbuffer[SSIZE];
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extern unsigned char bbuffer[SSIZE];
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extern short radir0[SSIZE];
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extern short radir1[SSIZE];
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extern short radir2[SSIZE];
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extern short radir3[SSIZE];
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extern short radir4[SSIZE];
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extern short radir5[SSIZE];
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void Polarplasma(unsigned short *vram, unsigned short shade[])
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{
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int x,y;
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unsigned char c;
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unsigned int c0;
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unsigned int *vram32 = (unsigned int*)vram;
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unsigned int k = prticks>>3;
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int i, j = 0;
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for (i=0; i<WIDTH*HEIGHT; i+=2)
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{
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c = dist_angle[j] + dist_angle[j+1] + k;
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c0 = shade[c];
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c = dist_angle[j+2] + dist_angle[j+3] + k;
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*vram32++ = (shade[c]<<16) | c0;
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j+=4;
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}
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}
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void Plasma(unsigned short *vram, unsigned short shade[])
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{
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unsigned int *vram32 = (unsigned int*)vram;
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unsigned int k = (prticks>>4)%438;
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unsigned int x, y;
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for (y=0; y<240; y++)
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for (x=0; x<320; x+=8)
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{
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*vram32++ = shade[(fsin1[x] + fsin2[y] + fsin3[x+y+k]) & 255] | (shade[(fsin1[x+1] + fsin2[y] + fsin3[x+y+k+1]) & 255]<<16);
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*vram32++ = shade[(fsin1[x+2] + fsin2[y] + fsin3[x+y+k+2]) & 255] | (shade[(fsin1[x+3] + fsin2[y] + fsin3[x+y+k+3]) & 255]<<16);
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*vram32++ = shade[(fsin1[x+4] + fsin2[y] + fsin3[x+y+k+4]) & 255] | (shade[(fsin1[x+5] + fsin2[y] + fsin3[x+y+k+5]) & 255]<<16);
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*vram32++ = shade[(fsin1[x+6] + fsin2[y] + fsin3[x+y+k+6]) & 255] | (shade[(fsin1[x+7] + fsin2[y] + fsin3[x+y+k+7]) & 255]<<16);
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}
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}
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void DrawSky(unsigned short *vram)
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{
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int x, y, xp, yp = 256*255;
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unsigned int *vram32 = (unsigned int*)vram;
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unsigned int c0;
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for (y=0; y<HEIGHT; y++)
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{
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for (x=0; x<WIDTH; x+=2)
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{
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xp = (x-(WIDTH>>1)) & 255;
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c0 = sky1[xp + yp];
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xp = (x+1-(WIDTH>>1)) & 255;
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*vram32++ = (sky1[xp + yp]<<16) | c0;
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}
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yp-=256;
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}
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}
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void Floor(unsigned short *vram, float ra, float zm)
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{
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int x,y;
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int u,v;
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int ira = SDL_GetTicks()>>4;
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int izm = zm;
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unsigned int c,i;
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unsigned int *vram32 = (unsigned int*)vram;
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i=0;
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for (y=0;y<HEIGHT - (HEIGHT>>2);y++)
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{
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for (x=0;x<WIDTH;x+=2)
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{
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u = floorstuff[i+1] & 127;
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v = (floorstuff[i] + ira) & 127;
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c = sky2[u + (v<<7)];
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u = floorstuff[i+3] & 127;
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v = (floorstuff[i+2] + ira) & 127;
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c = c | (sky2[u + (v<<7)]<<16);
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i+=4;
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*vram32++=c;
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}
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}
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}
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void Radial(unsigned short *avram, int fick)
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{
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int x,y,i,ri,sum;
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int r,g,b;
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int k = prticks/12;
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int dcx = sin((double)k/73.0)*(WIDTH>>1);
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int dcy = fick * sin((double)k/112.0)*(HEIGHT>>1);
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int dci = dcx + dcy*WIDTH;
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unsigned short *vram;
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//Initialize the buffer or something
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unsigned int *rbuffer32 = (unsigned int*)rbuffer, *gbuffer32 = (unsigned int*)gbuffer, *bbuffer32 = (unsigned int*)bbuffer;
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for (i=0; i<SSIZE; i+=4)
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{
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*rbuffer32++ = rbmp[i] | (rbmp[i+1]<<8) | (rbmp[i+2]<<16) | (rbmp[i+3]<<24);
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*gbuffer32++ = gbmp[i] | (gbmp[i+1]<<8) | (gbmp[i+2]<<16) | (gbmp[i+3]<<24);
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*bbuffer32++ = bbmp[i] | (bbmp[i+1]<<8) | (bbmp[i+2]<<16) | (bbmp[i+3]<<24);
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}
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/*
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Quadrants:
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Q2 | Q1
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---|--- <= The Screen
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Q3 | Q4
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Q1 and Q4 are kinda broken rn.
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*/
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// Quadrant 1
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vram=(unsigned short*)avram + WIDTH/2 + (HEIGHT/2-1)*WIDTH + dci;
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i=WIDTH/2 + (HEIGHT/2-1)*WIDTH + dci;
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ri=0;
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for (y=HEIGHT/2-1+dcy; y>=0; y--)
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{
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for (x=WIDTH/2+dcx; x<WIDTH; x++)
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{
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rbuffer[i] = (rbuffer[i] + rbuffer[i + radir3[ri]] + rbuffer[i + radir4[ri]] + rbuffer[i + radir5[ri]])>>2;
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gbuffer[i] = (gbuffer[i] + gbuffer[i + radir3[ri]] + gbuffer[i + radir4[ri]] + gbuffer[i + radir5[ri]])>>2;
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bbuffer[i] = (bbuffer[i] + bbuffer[i + radir3[ri]] + bbuffer[i + radir4[ri]] + bbuffer[i + radir5[ri]])>>2;
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//RGB565 0xFFFF
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*vram++ = ((rbuffer[i] >> 3) << 11) | ((gbuffer[i] >> 2) << 5) | (bbuffer[i] >> 3);
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i++;
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ri++;
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}
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i=i-3*(WIDTH/2)+dcx;
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ri+=WIDTH/2+dcx;
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vram=vram-3*(WIDTH/2)+dcx;
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}
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// Quadrant 2
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vram=(unsigned short*)avram + (WIDTH/2 - 1) + (HEIGHT/2 - 1)*WIDTH + dci;
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i=(WIDTH/2-1) + (HEIGHT/2-1)*WIDTH + dci;
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ri=0;
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for (y=HEIGHT/2-1+dcy; y>=0; y--)
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{
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for (x=WIDTH/2-1+dcx; x>=0; x--)
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{
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rbuffer[i] = (rbuffer[i] + rbuffer[i - radir0[ri]] + rbuffer[i - radir1[ri]] + rbuffer[i - radir2[ri]])>>2;
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gbuffer[i] = (gbuffer[i] + gbuffer[i - radir0[ri]] + gbuffer[i - radir1[ri]] + gbuffer[i - radir2[ri]])>>2;
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bbuffer[i] = (bbuffer[i] + bbuffer[i - radir0[ri]] + bbuffer[i - radir1[ri]] + bbuffer[i - radir2[ri]])>>2;
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//RGB565 0xFFFF
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//correct
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*vram-- = ((rbuffer[i] >> 3) << 11) | ((gbuffer[i] >> 2) << 5) | (bbuffer[i] >> 3);
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i--;
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ri++;
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}
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i=i-WIDTH/2+dcx;
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ri+=WIDTH/2-dcx;
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vram=vram-WIDTH/2+dcx;
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}
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// Quadrant 3
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vram=(unsigned short*)avram + (WIDTH/2 - 1) + (HEIGHT/2)*WIDTH + dci;
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i=(WIDTH/2-1) + (HEIGHT/2)*WIDTH + dci;
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ri=0;
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for (y=HEIGHT/2+dcy; y<HEIGHT; y++)
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{
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for (x=WIDTH/2-1+dcx; x>=0; x--)
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{
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rbuffer[i] = (rbuffer[i] + rbuffer[i - radir3[ri]] + rbuffer[i - radir4[ri]] + rbuffer[i - radir5[ri]])>>2;
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gbuffer[i] = (gbuffer[i] + gbuffer[i - radir3[ri]] + gbuffer[i - radir4[ri]] + gbuffer[i - radir5[ri]])>>2;
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bbuffer[i] = (bbuffer[i] + bbuffer[i - radir3[ri]] + bbuffer[i - radir4[ri]] + bbuffer[i - radir5[ri]])>>2;
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//RGB565 0xFFFF
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*vram-- = ((rbuffer[i] >> 3) << 11) | ((gbuffer[i] >> 2) << 5) | (bbuffer[i] >> 3);
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i--;
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ri++;
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}
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i+=3*(WIDTH/2)+dcx;
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ri+=WIDTH/2-dcx;
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vram+=3*(WIDTH/2)+dcx;
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}
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// Quadrant 4
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vram=(unsigned short*)avram + WIDTH/2 + (HEIGHT/2)*WIDTH + dci;
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i=WIDTH/2 + (HEIGHT/2)*WIDTH + dci;
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ri=0;
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for (y=HEIGHT/2+dcy; y<HEIGHT; y++)
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{
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for (x=WIDTH/2+dcx; x<WIDTH; x++)
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{
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rbuffer[i] = (rbuffer[i] + rbuffer[i + radir0[ri]] + rbuffer[i + radir1[ri]] + rbuffer[i + radir2[ri]])>>2;
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gbuffer[i] = (gbuffer[i] + gbuffer[i + radir0[ri]] + gbuffer[i + radir1[ri]] + gbuffer[i + radir2[ri]])>>2;
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bbuffer[i] = (bbuffer[i] + bbuffer[i + radir0[ri]] + bbuffer[i + radir1[ri]] + bbuffer[i + radir2[ri]])>>2;
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//RGB565 0xFFFF
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*vram++ = ((rbuffer[i] >> 3) << 11) | ((gbuffer[i] >> 2) << 5) | (bbuffer[i] >> 3);
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i++;
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ri++;
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}
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i+=WIDTH/2+dcx;
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ri+=WIDTH/2+dcx;
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vram+=WIDTH/2+dcx;
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}
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}
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