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This commit is contained in:
David Schmenk
parent
6bd1f34a62
commit
0da089d56a
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import pygame, math, sys
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from pygame.locals import *
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DEG_PER_CIRCLE = 128
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DEG_TO_RAD = math.pi*2/DEG_PER_CIRCLE
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FOV = DEG_PER_CIRCLE/3 # FOV in degrees
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PROJDIST = 0.5 #1.5 # Distance to projection plane
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PROJHEIGHT = 2.0 # Height of projection screen
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PROJBOT = 1.5 # Bottom of projection screen
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PROJTOP = PROJBOT+PROJHEIGHT # Top of projection screen
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EYEHEIGHT = PROJBOT+PROJHEIGHT/2 # Eye height
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HORIZON = 16#200
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tex1 = [[(0,0,0),(255,0,0)],[(0,255,0),(0,0,255)]]
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s = [[0 for x in xrange(DEG_PER_CIRCLE)] for y in xrange(255)]
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t = [[0 for x in xrange(DEG_PER_CIRCLE)] for y in xrange(255)]
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ds = [[0 for x in xrange(DEG_PER_CIRCLE)] for y in xrange(255)]
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dt = [[0 for x in xrange(DEG_PER_CIRCLE)] for y in xrange(255)]
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def setup(width, height):
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global HORIZON
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global s, t, ds, dt
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print 'ST_TBL ; S, T, DS, DT angle+scanline table'
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pixfov = math.tan(FOV/2*DEG_TO_RAD) / width/2
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for angle in xrange(DEG_PER_CIRCLE):
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viewv = math.sin(angle*DEG_TO_RAD)
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viewu = math.cos(angle*DEG_TO_RAD)
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scanv = viewu # sin((dirview+90)*DEG_TO_RAD)
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scanu = -viewv # cos((dirview+90)*DEG_TO_RAD)
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for scanline in xrange(0, height):
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if scanline >= HORIZON:
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break
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scanheight = scanline * PROJHEIGHT / height + PROJBOT
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if scanheight >= EYEHEIGHT:
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break
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scandist = EYEHEIGHT * PROJDIST / (EYEHEIGHT - scanheight)
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if scandist > PROJDIST and scandist < 256:
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s[scanline][angle] = viewu * scandist
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t[scanline][angle] = viewv * scandist
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dp = pixfov * scandist
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ds[scanline][angle] = scanu * dp
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dt[scanline][angle] = scanv * dp
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fxs = int(math.floor(s[scanline][angle]*1024+0.5))
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fxt = int(math.floor(t[scanline][angle]*1024+0.5))
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fxds = int(math.floor(ds[scanline][angle]*65536+0.5))
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fxdt = int(math.floor(dt[scanline][angle]*65536+0.5))
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# fxs = int(s[scanline][angle]*1024+0.5) # 6.10 fixpt
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# fxt = int(t[scanline][angle]*1024+0.5) # 6.10 fixpt
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# fxds = int(ds[scanline][angle]*65536+0.5) # 0.16 fixpt
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# fxdt = int(dt[scanline][angle]*65536+0.5) # 0.16 fixpt
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if fxs < 0:
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fxs += 65536
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if fxt < 0:
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fxt += 65536
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if fxds < 0:
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fxds += 65536
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if fxdt < 0:
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fxdt += 65536
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print '\t!WORD\t$%04X, $%04X, $%04X, $%04X\t;scan %d angle %d' % (fxs, fxt, fxds, fxdt, scanline, angle)
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if scanline > HORIZON:
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HORIZON = scanline
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def texel(s, t):
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return tex1[int(math.floor(s))&1][int(math.floor(t))&1]
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def draw(pixbuf, width, height, frame):
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xview = 0
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yview = 0
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dirview = frame%DEG_PER_CIRCLE
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for scanline in xrange(HORIZON):
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_s = xview + s[scanline][dirview]
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_t = yview + t[scanline][dirview]
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#
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# Draw right half of scanline
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#
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_ds = ds[scanline][dirview]
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_dt = dt[scanline][dirview]
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scans = _s + _ds / 2
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scant = _t + _dt / 2
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for x in xrange(width/2, width):
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pixbuf[x][(height-1)-scanline] = texel(scans, scant)
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scans += _ds
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scant += _dt
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#
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# Draw left half of scanline
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#
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scans = _s - _ds / 2
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scant = _t - _dt / 2
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for x in xrange(width/2-1, -1, -1):
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pixbuf[x][(height-1)-scanline] = texel(scans, scant)
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scans -= _ds
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scant -= _dt
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WIDTH = 30#320
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HEIGHT = 40#200
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pygame.init()
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surface = pygame.display.set_mode((WIDTH,HEIGHT))
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surfpix = pygame.PixelArray(surface)
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frame = 0
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setup(WIDTH, HEIGHT)
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while True:
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draw(surfpix, WIDTH, HEIGHT, frame)
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pygame.display.update()
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frame += 1
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for event in pygame.event.get():
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if event.type == QUIT or (event.type == KEYDOWN and event.key == K_ESCAPE):
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pygame.quit()
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sys.exit()
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@ -0,0 +1,75 @@
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#include <stdio.h>
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#include <stdlib.h>
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int scancmp(unsigned char bytes1[], unsigned char bytes2[], int len)
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{
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int i;
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for (i = 0; i < len; i++)
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if (bytes1[i] != bytes2[i])
|
||||
return -1;
|
||||
return 0;
|
||||
}
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
char type[4];
|
||||
int width, height, bytecount, bitcount, bit, prevbit, repeat, rle, linelen, prevlen;
|
||||
unsigned char scanline[256], prevline[256];
|
||||
|
||||
scanf("%s\n%d %d\n", type, &width, &height);
|
||||
fprintf(stderr, "%s -> %d, %d\n", type, width, height);
|
||||
prevlen = 0;
|
||||
repeat = 1;
|
||||
while (height--)
|
||||
{
|
||||
linelen = 0;
|
||||
rle = 0;
|
||||
prevbit = 0;
|
||||
for (bitcount = 0; bitcount < width; bitcount++)
|
||||
{
|
||||
while ((bit = getchar()) != '0' && bit != '1')
|
||||
if (bit == EOF)
|
||||
break;
|
||||
if (bit == prevbit)
|
||||
{
|
||||
rle++;
|
||||
}
|
||||
else
|
||||
{
|
||||
if (rle)
|
||||
scanline[linelen++] = (prevbit == '0' ? 128 : 0) + rle;
|
||||
prevbit = bit;
|
||||
rle = 1;
|
||||
}
|
||||
}
|
||||
if (rle)
|
||||
scanline[linelen++] = (prevbit == '0' ? 128 : 0) + rle;
|
||||
if (linelen == prevlen && scancmp(scanline, prevline, linelen) == 0)
|
||||
repeat++;
|
||||
else
|
||||
{
|
||||
if (prevlen)
|
||||
{
|
||||
printf("\t!BYTE\t0,%d\t; Scanline repeat count\n", repeat);
|
||||
printf("\t!BYTE\t");
|
||||
for (bytecount = 0; bytecount < prevlen-1; bytecount++)
|
||||
printf("%s%d,", prevline[bytecount] & 0x80 ? "128+" : "", prevline[bytecount] & 0x7F);
|
||||
printf("%s%d\n", prevline[prevlen-1] & 0x80 ? "128+" : "", prevline[prevlen-1] & 0x7F);
|
||||
}
|
||||
for (bytecount = 0; bytecount < linelen; bytecount++)
|
||||
prevline[bytecount] = scanline[bytecount];
|
||||
prevlen = linelen;
|
||||
repeat = 1;
|
||||
}
|
||||
}
|
||||
if (linelen)
|
||||
{
|
||||
printf("\t!BYTE\t0,%d\t; Scanline repeat count\n", repeat);
|
||||
printf("\t!BYTE\t");
|
||||
for (bytecount = 0; bytecount < linelen-1; bytecount++)
|
||||
printf("%s%d,", scanline[bytecount] & 0x80 ? "128+" : "", scanline[bytecount] & 0x7F);
|
||||
printf("%s%d\n", scanline[linelen-1] & 0x80 ? "128+" : "", scanline[linelen-1] & 0x7F);
|
||||
}
|
||||
printf("\t!BYTE 0,0\t; End of compressed map\n");
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,15 @@
|
|||
import math, sys
|
||||
|
||||
DEG_PER_CIRCLE = 128
|
||||
DEG_TO_RAD = math.pi*2/DEG_PER_CIRCLE
|
||||
|
||||
print 'SIN_TBL'
|
||||
for angle in xrange(DEG_PER_CIRCLE+DEG_PER_CIRCLE/4):
|
||||
if angle == DEG_PER_CIRCLE/4:
|
||||
print 'COS_TBL'
|
||||
sincos = math.sin(angle*DEG_TO_RAD)
|
||||
fxs = int(math.floor(sincos*127.0))
|
||||
if fxs < 0:
|
||||
fxs += 256
|
||||
print '\t!BYTE\t$%03X\t; angle %d' % (fxs, angle)
|
||||
|
||||
|
|
@ -0,0 +1,11 @@
|
|||
import math, sys
|
||||
|
||||
DEG_PER_CIRCLE = 128
|
||||
DEG_TO_RAD = math.pi*2/DEG_PER_CIRCLE
|
||||
|
||||
print 'TAN_TBL'
|
||||
for angle in xrange(DEG_PER_CIRCLE/4):
|
||||
tan = math.tan(angle*DEG_TO_RAD)
|
||||
fxt = int(math.floor(tan*256.0+0.5))
|
||||
print '\t!WORD\t$%04X\t; angle %d' % (fxt, angle)
|
||||
|
||||
Loading…
Reference in New Issue