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Rewrote the sinus display using the new cc65_sin function.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@4403 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz 2009-10-30 14:03:21 +00:00
parent 4e4beef8b7
commit 7b8fbb31da
1 changed files with 31 additions and 47 deletions
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78
samples/tgidemo.c
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@ -1,5 +1,6 @@
#include <stdio.h>
#include <stdlib.h>
#include <cc65.h>
#include <conio.h>
#include <ctype.h>
#include <modload.h>
@ -17,41 +18,6 @@
static const unsigned char SinusTable[] = {
0x64,0x63,0x61,0x5F,0x5D,0x5B,0x59,0x57,0x55,0x54,
0x52,0x50,0x4E,0x4C,0x4A,0x49,0x47,0x45,0x43,0x42,
0x40,0x3E,0x3C,0x3B,0x39,0x38,0x36,0x34,0x33,0x31,
0x30,0x2E,0x2D,0x2B,0x2A,0x28,0x27,0x26,0x24,0x23,
0x22,0x20,0x1F,0x1E,0x1D,0x1C,0x1B,0x1A,0x19,0x18,
0x17,0x16,0x15,0x14,0x13,0x12,0x12,0x11,0x10,0x10,
0x0F,0x0E,0x0E,0x0D,0x0D,0x0C,0x0C,0x0C,0x0B,0x0B,
0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,0x0B,
0x0B,0x0B,0x0B,0x0C,0x0C,0x0C,0x0D,0x0D,0x0E,0x0E,
0x0F,0x10,0x10,0x11,0x12,0x12,0x13,0x14,0x15,0x16,
0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,0x20,
0x22,0x23,0x24,0x26,0x27,0x28,0x2A,0x2B,0x2D,0x2E,
0x30,0x31,0x33,0x34,0x36,0x38,0x39,0x3B,0x3C,0x3E,
0x40,0x42,0x43,0x45,0x47,0x49,0x4A,0x4C,0x4E,0x50,
0x52,0x54,0x55,0x57,0x59,0x5B,0x5D,0x5F,0x61,0x63,
0x64,0x65,0x67,0x69,0x6B,0x6D,0x6F,0x71,0x73,0x74,
0x76,0x78,0x7A,0x7C,0x7E,0x7F,0x81,0x83,0x85,0x86,
0x88,0x8A,0x8C,0x8D,0x8F,0x91,0x92,0x94,0x95,0x97,
0x98,0x9A,0x9B,0x9D,0x9E,0xA0,0xA1,0xA2,0xA4,0xA5,
0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,
0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB6,0xB7,0xB8,0xB8,
0xB9,0xBA,0xBA,0xBB,0xBB,0xBC,0xBC,0xBC,0xBD,0xBD,
0xBD,0xBD,0xBD,0xBD,0xBD,0xBD,0xBD,0xBD,0xBD,0xBD,
0xBD,0xBD,0xBD,0xBC,0xBC,0xBC,0xBB,0xBB,0xBA,0xBA,
0xB9,0xB8,0xB8,0xB7,0xB6,0xB6,0xB5,0xB4,0xB3,0xB2,
0xB1,0xB0,0xAF,0xAE,0xAD,0xAC,0xAB,0xAA,0xA9,0xA8,
0xA6,0xA5,0xA4,0xA2,0xA1,0xA0,0x9E,0x9D,0x9B,0x9A,
0x98,0x97,0x95,0x94,0x92,0x91,0x8F,0x8D,0x8C,0x8A,
0x88,0x86,0x85,0x83,0x81,0x7F,0x7E,0x7C,0x7A,0x78,
0x76,0x74,0x73,0x71,0x6F,0x6D,0x6B,0x69,0x67,0x65
};
/* Driver stuff */
static unsigned MaxX;
static unsigned MaxY;
@ -146,21 +112,39 @@ static void DoCheckerboard (void)
static void DoDiagram (void)
{
static const unsigned char Palette[2] = { COLOR_WHITE, COLOR_BLACK };
unsigned X, I;
int XOrigin, YOrigin;
int Amp;
int X, Y;
unsigned I;
tgi_setpalette (Palette);
tgi_setcolor (COLOR_FORE);
tgi_line (10, 10, 10, MaxY-10);
tgi_lineto (MaxX-10, MaxY-10);
tgi_line (8, 12, 10, 10);
tgi_lineto (12, 12);
tgi_line (MaxX-12, MaxY-12, MaxX-10, MaxY-10);
tgi_lineto (MaxX-12, MaxY-8);
for (I = 0, X = 10; X < MaxX-10; ++X) {
tgi_setpixel (X, SinusTable[I]);
if (++I >= sizeof (SinusTable)) {
I = 0;
}
/* Determine zero and aplitude */
YOrigin = MaxY / 2;
XOrigin = 10;
Amp = (MaxY - 19) / 2;
/* Y axis */
tgi_line (XOrigin, 10, XOrigin, MaxY-10);
tgi_line (XOrigin-2, 12, XOrigin, 10);
tgi_lineto (XOrigin+2, 12);
/* X axis */
tgi_line (XOrigin, YOrigin, MaxX-10, YOrigin);
tgi_line (MaxX-12, YOrigin-2, MaxX-10, YOrigin);
tgi_lineto (MaxX-12, YOrigin+2);
/* Sine */
tgi_gotoxy (XOrigin, YOrigin);
for (I = 0; I <= 360; I += 5) {
/* Calculate the next points */
X = (int) (((long) (MaxX - 19) * I) / 360);
Y = (int) (((long) Amp * -cc65_sin (I)) / 256);
/* Draw the line */
tgi_lineto (XOrigin + X, YOrigin + Y);
}
cgetc ();