57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* Jeroen Domburg <jeroen@spritesmods.com> wrote this file. As long as you retain
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* this notice you can do whatever you want with this stuff. If we meet some day,
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* and you think this stuff is worth it, you can buy me a beer in return.
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* ----------------------------------------------------------------------------
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*/
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#include "mouse.h"
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typedef struct {
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int dx, dy;
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int btn;
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int rpx, rpy;
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} Mouse;
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static const int quad[4]={0x0, 0x1, 0x3, 0x2};
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Mouse mouse;
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#define MAXCDX 50
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void mouseMove(int dx, int dy, int btn) {
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mouse.dx+=dx;
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mouse.dy+=dy;
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if (mouse.dx>MAXCDX) mouse.dx=MAXCDX;
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if (mouse.dy>MAXCDX) mouse.dy=MAXCDX;
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if (mouse.dx<-MAXCDX) mouse.dx=-MAXCDX;
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if (mouse.dy<-MAXCDX) mouse.dy=-MAXCDX;
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if (btn) mouse.btn=1; else mouse.btn=0;
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}
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int mouseTick() {
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int ret=0;
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if (mouse.dx>0) {
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mouse.dx--;
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mouse.rpx--;
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}
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if (mouse.dx<0) {
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mouse.dx++;
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mouse.rpx++;
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}
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if (mouse.dy>0) {
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mouse.dy--;
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mouse.rpy++;
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}
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if (mouse.dy<0) {
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mouse.dy++;
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mouse.rpy--;
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}
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ret=quad[mouse.rpx&3];
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ret|=quad[mouse.rpy&3]<<2;
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ret|=mouse.btn<<4;
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// printf("dx %d dy %d ret %x\n", mouse.dx, mouse.dy, ret);
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return ret;
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}
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