diff --git a/batrang.c b/batrang.c
index 52aabf28ad4f0b6c3752e8221941ff030e383ed4..db7ee1616aef639f0fc019c055f311f7318b7976 100644
--- a/batrang.c
+++ b/batrang.c
@@ -3,89 +3,190 @@
#include <graphics.h>
#include <math.h>
-void bezier (int x[4], int y[4])
-{
+#define LEFT 0
+#define TOP 1
+#define RIGHT 2
+#define BOTTOM 3
+#define BOUND 30
+double ANG(double x) { return x*3.1415/180; }
- int i;
- double t;
- double xm,ym;
+double xm,ym;
+double ang = 0;
+int flag[] = {0,0,0,0};
+int kbhit() {
+ struct timeval tv;
+ fd_set fds;
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
+ FD_ZERO(&fds);
+ FD_SET(STDIN_FILENO, &fds); //STDIN_FILENO is 0
+ select(STDIN_FILENO+1, &fds, NULL, NULL, &tv);
+ return FD_ISSET(STDIN_FILENO, &fds);
+}
+double rotatex(double x, double y, double angle, double pivotx, double pivoty){
+ return (x)*cos(angle) - (y)*sin(angle) + pivotx* (1-cos(angle)) + pivoty*(sin(angle));
+ // return (x - pivotx)*cos(angle) - (y - pivoty)*sin(angle) + pivotx;
+}
+double rotatey(double x, double y, double angle, double pivotx, double pivoty){
+ return (x)*sin(angle) + (y)*cos(angle) + pivoty* (1-cos(angle)) - pivotx*(sin(angle));
+ // return (x - pivotx)*sin(angle) - (y - pivoty)*cos(angle) + pivoty;
+}
+void bezier (int x[4], int y[4]) {
- xm = getmaxx()/2;
- ym = getmaxy()/2;
+ int i;
+ double u;
- for (i=0; i<4; i++)
- putpixel ((xm+x[i]), (ym-y[i]), YELLOW);
+ // for (i=0; i<4; i++)
+ // putpixel ((xm+x[i]), (ym-y[i]), YELLOW);
- for (t = 0.0; t < 1.0; t += 0.0001)
+ for (u = 0.0; u < 1.0; u += 0.01)
{
- double xt = pow (1-t, 3) * x[0] + 3 * t * pow (1-t, 2) * x[1] +
- 3 * pow (t, 2) * (1-t) * x[2] + pow (t, 3) * x[3];
+ double xt = pow (1-u, 3) * x[0] + 3 * u * pow (1-u, 2) * x[1] +
+ 3 * pow (u, 2) * (1-u) * x[2] + pow (u, 3) * x[3];
+
+ double yt = pow (1-u, 3) * y[0] + 3 * u * pow (1-u, 2) * y[1] +
+ 3 * pow (u, 2) * (1-u) * y[2] + pow (u, 3) * y[3];
+
+ xt += xm;
+ yt = ym - yt;
- double yt = pow (1-t, 3) * y[0] + 3 * t * pow (1-t, 2) * y[1] +
- 3 * pow (t, 2) * (1-t) * y[2] + pow (t, 3) * y[3];
+ if (rotatex(xt, yt, ANG(ang), xm, ym) <= BOUND)
+ flag[LEFT] = 1;
+ if (rotatex(xt, yt, ANG(ang), xm, ym) >= getmaxx()-BOUND)
+ flag[RIGHT] = 1;
+ if (rotatey(xt, yt, ANG(ang), xm, ym) <= BOUND)
+ flag[TOP] = 1;
+ if (rotatey(xt, yt, ANG(ang), xm, ym) >= getmaxy()-BOUND)
+ flag[BOTTOM] = 1;
- xt += xm;
- yt = ym - yt;
- putpixel (xt,yt, WHITE);
+ if(!(flag[LEFT]==1||flag[RIGHT]==1||flag[TOP]==1||flag[BOTTOM]==1)){
+ putpixel ((int)rotatex(xt, yt, ANG(ang), xm, ym),
+ (int)rotatey(xt, yt, ANG(ang), xm, ym),
+ WHITE);
+ }
}
return;
}
-void main()
-{
+void main() {
int x[4], y[4];
- int xm,ym;
+ int x_step=5, y_step=5, ang_step = 5;
int gd = DETECT, gm;
+ int i = 0;
initgraph(&gd, &gm, "");
xm = getmaxx()/2;
ym = getmaxy()/2;
-
- x[0]=xm-20; y[0]=ym;
- x[1]=xm-100; y[1]=ym;
- x[2]=xm+20; y[2]=ym;
- x[3]=xm+100; y[3]=ym;
-
- line(x[0],y[0],x[1],y[1]);
- line(x[2],y[2],x[3],y[3]);
-
- //Bat left top wing
- x[0]=-100; y[0]=0;
- x[1]=-60; y[1]=-10;
- x[2]=-60; y[2]=-20;
- x[3]=-60; y[3]=-30;
- bezier (x,y);
-
- //Bat left bottom wing
- x[0]=-60; y[0]=-30;
- x[1]=-40; y[1]=-32;
- x[2]=-20; y[2]=-34;
- x[3]=0; y[3]=-50;
- bezier (x,y);
-
- //Bat right top wing
- x[0]=100; y[0]=0;
- x[1]=60; y[1]=-10;
- x[2]=60; y[2]=-20;
- x[3]=60; y[3]=-30;
- bezier (x,y);
-
- //Bat right bottom wing
- x[0]=60; y[0]=-30;
- x[1]=40; y[1]=-32;
- x[2]=20; y[2]=-34;
- x[3]=0; y[3]=-50;
- bezier (x,y);
-
- //Bat head cave in
- x[0]=-20; y[0]=0;
- x[1]=-10; y[1]=-10;
- x[2]=10; y[2]=-10;
- x[3]=20; y[3]=0;
- bezier (x,y);
-
- getch();
+
+ while(!kbhit()) {
+
+ if (flag[LEFT] == 1) {
+ x_step = 5;
+ if ((ang > 180 && ang < 270) || (ang > 0 && ang < 90)) {
+ ang_step = -ang_step;
+ }
+ }
+ if (flag[RIGHT] == 1) {
+ x_step = -5;
+ if ((ang > 180 && ang < 270) || (ang > 0 && ang < 90)) {
+ ang_step = -ang_step;
+ }
+ }
+ if (flag[TOP] == 1) {
+ y_step = 5;
+ if (!((ang > 180 && ang < 270) || (ang > 0 && ang < 90))) {
+ ang_step = -ang_step;
+ }
+ }
+ if (flag[BOTTOM] == 1) {
+ y_step = -5;
+ if ((ang > 90 && ang < 180) || (ang > 0 && ang < 90)) {
+ ang_step = -ang_step;
+ }
+ }
+
+ ang = (double)(((int)(ang+ang_step))%359);
+ xm += x_step;
+ ym += y_step;
+
+ for(int loop = 0; loop < 4; loop++) flag[loop]=0;
+
+ x[0]=xm-20; y[0]=ym;
+ x[1]=xm-100; y[1]=ym;
+ x[2]=xm+20; y[2]=ym;
+ x[3]=xm+100; y[3]=ym;
+
+ rectangle (BOUND,BOUND,getmaxx()-BOUND,getmaxy()-BOUND);
+ if ((int)rotatex(x[0],y[0],ANG(ang),xm,ym) < BOUND ||
+ (int)rotatey(x[0],y[0],ANG(ang),xm,ym) < BOUND ||
+ (int)rotatex(x[1],y[1],ANG(ang),xm,ym) < BOUND ||
+ (int)rotatey(x[1],y[1],ANG(ang),xm,ym) < BOUND ||
+ (int)rotatex(x[2],y[2],ANG(ang),xm,ym) < BOUND ||
+ (int)rotatey(x[2],y[2],ANG(ang),xm,ym) < BOUND ||
+ (int)rotatex(x[3],y[3],ANG(ang),xm,ym) < BOUND ||
+ (int)rotatey(x[3],y[3],ANG(ang),xm,ym) < BOUND ||
+ (int)rotatex(x[0],y[0],ANG(ang),xm,ym) > getmaxx() - BOUND ||
+ (int)rotatey(x[0],y[0],ANG(ang),xm,ym) > getmaxy() - BOUND ||
+ (int)rotatex(x[1],y[1],ANG(ang),xm,ym) > getmaxx() - BOUND ||
+ (int)rotatey(x[1],y[1],ANG(ang),xm,ym) > getmaxy() - BOUND ||
+ (int)rotatex(x[2],y[2],ANG(ang),xm,ym) > getmaxx() - BOUND ||
+ (int)rotatey(x[2],y[2],ANG(ang),xm,ym) > getmaxy() - BOUND ||
+ (int)rotatex(x[3],y[3],ANG(ang),xm,ym) > getmaxx() - BOUND ||
+ (int)rotatey(x[3],y[3],ANG(ang),xm,ym) > getmaxy() - BOUND) {
+ //pass
+ } else {
+ line(
+ (int)rotatex(x[0],y[0],ANG(ang),xm,ym),
+ (int)rotatey(x[0],y[0],ANG(ang),xm,ym),
+ (int)rotatex(x[1],y[1],ANG(ang),xm,ym),
+ (int)rotatey(x[1],y[1],ANG(ang),xm,ym)
+ );
+ line(
+ (int)rotatex(x[2],y[2],ANG(ang),xm,ym),
+ (int)rotatey(x[2],y[2],ANG(ang),xm,ym),
+ (int)rotatex(x[3],y[3],ANG(ang),xm,ym),
+ (int)rotatey(x[3],y[3],ANG(ang),xm,ym)
+ );
+ }
+ //left top wing
+ x[0]=-100; y[0]=0;
+ x[1]=-60; y[1]=-10;
+ x[2]=-60; y[2]=-20;
+ x[3]=-60; y[3]=-30;
+ bezier (x,y);
+
+ //left bottom wing
+ x[0]=-60; y[0]=-30;
+ x[1]=-40; y[1]=-32;
+ x[2]=-20; y[2]=-34;
+ x[3]=0; y[3]=-50;
+ bezier (x,y);
+
+ //right top wing
+ x[0]=100; y[0]=0;
+ x[1]=60; y[1]=-10;
+ x[2]=60; y[2]=-20;
+ x[3]=60; y[3]=-30;
+ bezier (x,y);
+
+ //right bottom wing
+ x[0]=60; y[0]=-30;
+ x[1]=40; y[1]=-32;
+ x[2]=20; y[2]=-34;
+ x[3]=0; y[3]=-50;
+ bezier (x,y);
+
+ //head
+ x[0]=-20; y[0]=0;
+ x[1]=-10; y[1]=-10;
+ x[2]=10; y[2]=-10;
+ x[3]=20; y[3]=0;
+ bezier (x,y);
+
+ delay(15);
+ cleardevice();
+ }
closegraph();
}
\ No newline at end of file