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https://github.com/rigreco/Runge-Kutta-Simulation.git
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113 lines
2.5 KiB
C
113 lines
2.5 KiB
C
/* ------------------------------------------------------------------------
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System : Manx Aztec C65 Version 3.2b
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MS-DOS cross-development environment
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Platform : Apple IIe 128K PRODOS 8
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Program : fbox2.c
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Description : G2 Library Routine
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Written by : Bill Buckels
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Revision Date: July 7, 1991
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Licence : You may use this code for whatever you wish as long
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as you agree that Bill Buckels has no warranty or
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liability obligations whatsoever from said use.
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------------------------------------------------------------------------ */
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extern unsigned HB[];
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flood(x1,y1,x2,y2,drawcolor)
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int x1,y1,x2,y2,drawcolor;
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{
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/* draws a filled box to the color specified */
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int packet = (x2-x1)+1;
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int temp,ctr;
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char *ptr;
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char c[40];
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y2++;
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if(x1%2!=0)
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{
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switch(drawcolor)
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{
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case 5:drawcolor=6;break;
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case 6:drawcolor=5;break;
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case 2:drawcolor=1;break;
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case 1:drawcolor=2;
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}
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}
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/* set the color */
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switch(drawcolor)
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{
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case 5 : c[0]='\xd5'^0xff; c[1]='\xaa'^0xff; /* green */
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break;
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case 6 : c[0]='\xaa'^0xff; c[1]='\xd5'^0xff; /* violet */
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break;
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case 2 : c[0]='\xaa'; c[1]='\xd5'; /* orange */
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break;
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case 1 : c[0]='\xd5'; c[1]='\xaa'; /* blue */
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break;
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case 4 : while(y1<y2) /* inverse video */
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{
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temp=HB[y1];
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ptr = (char *)(temp+x1);
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ctr = 0;
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while(ctr<packet)
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{
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*ptr^='\x7f';
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*ptr++;
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ctr++;
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}
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y1++;
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}
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return 0;
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/* white or black set the memory... */
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case 3 : drawcolor =255; /* white */
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default:
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/* black */
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while(y1<y2)
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{
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temp=HB[y1];
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setmem((temp+x1),packet,(char)drawcolor);
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y1++;
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}
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}
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/* fill the buffer if blue, orange, green, or violet */
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ptr=(char *)&c[2];
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ctr=2;
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while(ctr<packet)
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{
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*ptr++=c[0];
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ctr++;
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if(ctr<packet)*ptr++=c[1];
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ctr++;
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}
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/* now write the pixels */
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while(y1<y2)
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{
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temp=HB[y1];
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movmem(c,(temp+x1),packet);
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y1++;
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}
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return 0;
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}
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