diff options
Diffstat (limited to 'engines/mortevielle/droite.h')
| -rw-r--r-- | engines/mortevielle/droite.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/engines/mortevielle/droite.h b/engines/mortevielle/droite.h new file mode 100644 index 0000000000..7dd029e2ec --- /dev/null +++ b/engines/mortevielle/droite.h @@ -0,0 +1,35 @@ +void droite( integer x, integer y, integer xx, integer yy, integer coul ) + { + integer step,i; + real a,b; + real xr,yr,xro,yro; + + xr=x; yr=y; xro=xx; yro=yy; + /*writeln(le_file,'(',x:4,',',y:4,') ==> (',xx:4,',',yy:4,')');*/ + if (abs(y-yy) > abs(x-xx)) + { + a= (real)((x-xx)) / (y-yy); + b= ( yr*xro - yro*xr) / (y-yy); + i=y; + if (y>yy) step=-1; + else step=1; + do { + putpix(gd, trunc(a*i+b), i, coul); + i=i+step; + } while (!(i==yy)); + /*writeln(le_file,'X == ',a:3:3,' * Y + ',b:3:3);*/ + } + else + { + a= (real)((y-yy)) / (x-xx); + b= ((yro*xr) - (yr*xro)) / (x-xx); + i=x; + if (x>xx) step=-1; + else step=1; + do { + putpix(gd,i, trunc(a*i+b), coul); + i=i+step; + } while (!(i==xx)); + /*writeln(le_file,'Y == ',a:3:3,' * X + ',b:3:3);*/ + } + }
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