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TPUG - Toronto PET Users Group
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AMIGA
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AMICUS
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AMICUS01.ADF
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C
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sparks.c
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C/C++ Source or Header
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1986-01-09
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7KB
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278 lines
/************************************************************************
* Sparks.c -- One of those graphics dazzlers which are so easy to do on
* the Amiga. Aside from that, I think it is a fairly decent
* example of how to do simple things - menus, for example,
* using Intuition. Hope ya'all enjoy it.
*
* Copyright (c) 1985 by Scott Ballantyne
* Mainly so I can say give it away, distribute it, post it
* on other nets, etc.
************************************************************************/
#include <exec/types.h> /* Not all of these are used -- I include them */
#include <exec/nodes.h> /* 'cause I'm sick of compiler warnings. */
#include <exec/lists.h>
#include <exec/exec.h>
#include <exec/execbase.h>
#include <exec/ports.h>
#include <exec/devices.h>
#include <exec/memory.h>
#include <hardware/blit.h>
#include <graphics/copper.h>
#include <graphics/regions.h>
#include <graphics/rastport.h>
#include <graphics/gfxbase.h>
#include <graphics/gfxmacros.h>
#include <graphics/gels.h>
#include <intuition/intuition.h>
struct IntuitionBase *IntuitionBase = NULL;
struct GfxBase *GfxBase = NULL;
#define MAXX 640
struct NewScreen MyScreen =
{ 0,0,MAXX,200,4,0,1,HIRES, CUSTOMSCREEN, NULL, "Sparks!", 0,0,};
struct NewWindow DrawWindow = {
0,0,MAXX,200,
0,1,
MENUPICK,
BORDERLESS | BACKDROP | ACTIVATE,
NULL,
NULL,
NULL,
NULL,
NULL,
0,0,0,0,
CUSTOMSCREEN,
};
struct Screen *Screen = NULL;
struct Window *Backdrop = NULL;
struct RastPort *DrawRP;
struct ViewPort *DrawVP;
struct IntuiMessage *message;
struct MenuItem OnlyMenuItems[3];
struct IntuiText OnlyMenuText[3];
struct Menu OnlyMenu[1];
#define MAXLINES 125
#define ERASE 0
main()
{
int lx1[MAXLINES], lx2[MAXLINES], x1, x2;
UBYTE ly1[MAXLINES], ly2[MAXLINES], y1, y2;
UBYTE cl;
BYTE color;
int deltax1, deltay1, deltax2, deltay2;
ULONG class;
USHORT code, ItemNum;
for(x1 = 0; x1 < MAXLINES; x1++)
lx1[x1] = ly1[x1] = lx2[x1] = ly2[x1] = 0;
color = 2;
x1 = x2 = 160;
y1 = y2 = 100;
cl = 0;
selectdelta(&deltax1, &deltay1, &deltax2, &deltay2);
if (!(IntuitionBase = (struct IntuitionBase *)OpenLibrary("intuition.library",0)))
exit(1);
if(!(GfxBase = (struct GfxBase *)OpenLibrary("graphics.library",0))) {
cleanitup();
exit(2);
}
if(!(Screen = (struct Screen *)OpenScreen(&MyScreen))) {
cleanitup();
exit(3);
}
DrawWindow.Screen = Screen;
if(!(Backdrop = (struct Window *)OpenWindow(&DrawWindow))) {
cleanitup();
exit(4);
}
DrawRP = Backdrop->RPort; /* Draw into backdrop window */
DrawVP = &Screen->ViewPort; /* Set colors in Screens VP */
setcolors();
initmenuitems();
initmenu();
SetMenuStrip(Backdrop, &OnlyMenu[0]);
FOREVER {
while(message = (struct IntuiMessage *)GetMsg(Backdrop->UserPort)) {
class = message->Class;
code = message->Code;
ReplyMsg(message);
if (class == MENUPICK && code != MENUNULL) {
ItemNum = ITEMNUM( code );
switch (ItemNum) {
case 0:
ShowTitle(Screen, FALSE);
break;
case 1:
ShowTitle(Screen, TRUE);
break;
case 2:
ClearMenuStrip(Backdrop);
cleanitup();
exit(0);
}
}
}
draw(lx1[cl], ly1[cl], lx2[cl], ly2[cl], ERASE);
if (RangeRand(6) == 0)
color = RangeRand(16);
if (RangeRand(6) == 0)
selectdelta(&deltax1, &deltay1, &deltax2, &deltay2);
adjust_x(&x1, &deltax1);
adjust_y(&y1, &deltay1);
adjust_x(&x2, &deltax2);
adjust_y(&y2, &deltay2);
draw(x1, y1, x2, y2, color);
lx1[cl] = x1;
lx2[cl] = x2;
ly1[cl] = y1;
ly2[cl] = y2;
if (++cl >= MAXLINES)
cl = 0;
}
}
cleanitup() /* release allocated resources */
{
if (Backdrop)
CloseWindow(Backdrop);
if (Screen)
CloseScreen(Screen);
if (GfxBase)
CloseLibrary(GfxBase);
if (IntuitionBase)
CloseLibrary(IntuitionBase);
}
adjust_x(x, deltax) /* make new xcor - if out of range adjust */
int *x, *deltax;
{
int junk;
junk = *x + *deltax;
if (junk < 1 | junk >= MAXX) {
junk = *x;
*deltax *= -1;
}
*x = junk;
}
adjust_y(y, deltay)
UBYTE *y;
int *deltay;
{
int junk;
junk = *y + *deltay;
if (junk < 1 | junk > 199) {
junk = *y;
*deltay *= -1;
}
*y = junk;
}
selectdelta(dx1, dy1, dx2, dy2)
int *dx1, *dy1, *dx2, *dy2;
{
*dx1 = 2 * (RangeRand(7) - 3);
*dy1 = 2 * (RangeRand(7) - 3);
*dx2 = 2 * (RangeRand(7) - 3);
*dy2 = 2 * (RangeRand(7) - 3);
}
draw(x1, y1, x2, y2, color)
int x1, x2;
UBYTE y1, y2;
BYTE color;
{
SetAPen(DrawRP, color);
SetDrMd(DrawRP, JAM1);
Move(DrawRP, x1, y1);
Draw(DrawRP, x2, y2);
}
setcolors()
{
SetRGB4(DrawVP, 0, 0, 0, 0);
SetRGB4(DrawVP, 1, 3, 5, 10);
SetRGB4(DrawVP, 2, 15, 15, 15);
SetRGB4(DrawVP, 3, 15, 6, 0);
SetRGB4(DrawVP, 4, 14, 3, 0);
SetRGB4(DrawVP, 5, 15, 11, 0);
SetRGB4(DrawVP, 6, 15, 15, 2);
SetRGB4(DrawVP, 7, 11, 15, 0);
SetRGB4(DrawVP, 8, 5, 13, 0);
SetRGB4(DrawVP, 9, 0, 0, 15);
SetRGB4(DrawVP, 10, 3, 6, 15);
SetRGB4(DrawVP, 11, 7, 7, 15);
SetRGB4(DrawVP, 12, 12, 0, 14);
SetRGB4(DrawVP, 13, 15, 2, 14);
SetRGB4(DrawVP, 15, 13, 11, 8);
}
initmenuitems()
{
short n;
for(n = 0; n < 3; n++) { /* One struct for each item */
OnlyMenuItems[n].NextItem = &OnlyMenuItems[n + 1]; /* next item */
OnlyMenuItems[n].LeftEdge = 0;
OnlyMenuItems[n].TopEdge = 10 * n;
OnlyMenuItems[n].Width = 112;
OnlyMenuItems[n].Height = 10;
OnlyMenuItems[n].Flags = ITEMTEXT | ITEMENABLED | HIGHCOMP;
OnlyMenuItems[n].MutualExclude = 0;
OnlyMenuItems[n].ItemFill = (APTR)&OnlyMenuText[n];
OnlyMenuItems[n].SelectFill = NULL;
OnlyMenuItems[n].Command = 0;
OnlyMenuItems[n].SubItem = NULL;
OnlyMenuItems[n].NextSelect = 0;
OnlyMenuText[n].FrontPen = 0;
OnlyMenuText[n].BackPen = 1;
OnlyMenuText[n].DrawMode = JAM2;
OnlyMenuText[n].LeftEdge = 0;
OnlyMenuText[n].TopEdge = 1;
OnlyMenuText[n].ITextFont = NULL;
OnlyMenuText[n].NextText = NULL;
}
OnlyMenuItems[2].NextItem = NULL; /* Last item */
OnlyMenuText[0].IText = (UBYTE *)"Hide Title Bar";
OnlyMenuText[1].IText = (UBYTE *)"Show Title Bar";
OnlyMenuText[2].IText = (UBYTE *)"QUIT!";
}
initmenu()
{
OnlyMenu[0].NextMenu = NULL; /* No more menus */
OnlyMenu[0].LeftEdge = 0;
OnlyMenu[0].TopEdge = 0;
OnlyMenu[0].Width = 85;
OnlyMenu[0].Height = 10;
OnlyMenu[0].Flags = MENUENABLED; /* All items selectable */
OnlyMenu[0].MenuName = "Actions";
OnlyMenu[0].FirstItem = &OnlyMenuItems[0]; /* Pointer to first item */
}