Draw tail

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

MeercaChase.cpp

@@ -35,10 +35,10 @@ public:
 	int moveSpd=4;
 	float meercaSpd[2] = {0,0};
 	float meercaPos[2] = {240,240};
+	float*meercaPreviousPos=NULL;
 	float neggPos[2] = {};
 	float*badNeggs=NULL;
 	int badNeggCount=0;
-	TailData*tail=NULL;
 	int tailSize=0;
 
 	void assignNeggRandomPos() {
@@ -80,15 +80,11 @@ public:
 		srand(432189);
 		assignNeggRandomPos();
 		if (badNeggs!=NULL) {free(badNeggs);}
-		if (tail!=NULL) {
-			for (int i=0;i<tailSize;i++) {
-				free(tail[i].future_direction);
-				free(tail[i].pos);
-				free(tail[i].frameCount);
-			}
-			free(tail);}
+		if (meercaPreviousPos!=NULL) {
+			free(meercaPreviousPos);
+		}
 		badNeggs=(float*)malloc(sizeof(float)*0);
-		tail=(TailData*)malloc(sizeof(TailData)*0);
+		meercaPreviousPos=(float*)malloc(sizeof(float)*0);
 		badNeggCount=0;
 		tailSize=0;
 		meercaPos[0]=240;
@@ -123,38 +119,18 @@ public:
 		if (GetKey(olc::W).bPressed&&(meercaSpd[0]+meercaSpd[1]==0||meercaSpd[0]!=0)) {
 			meercaSpd[0]=0;
 			meercaSpd[1]=-moveSpd;
-			if (tailSize>0) {
-				tail[0].future_direction[tail[0].futureIndex]=UP;
-				tail[0].frameCount[tail[0].futureIndex]=TAIL_DISTANCE;
-				tail[0].futureIndex=(tail[0].futureIndex+1)%TAIL_DISTANCE;
-			}
 		}
 		if (GetKey(olc::A).bPressed&&(meercaSpd[0]+meercaSpd[1]==0||meercaSpd[1]!=0)) {
 			meercaSpd[0]=-moveSpd;
 			meercaSpd[1]=0;
-			if (tailSize>0) {
-				tail[0].future_direction[tail[0].futureIndex]=LEFT;
-				tail[0].frameCount[tail[0].futureIndex]=TAIL_DISTANCE;
-				tail[0].futureIndex=(tail[0].futureIndex+1)%TAIL_DISTANCE;
-			}
 		}
 		if (GetKey(olc::D).bPressed&&(meercaSpd[0]+meercaSpd[1]==0||meercaSpd[1]!=0)) {
 			meercaSpd[0]=moveSpd;
 			meercaSpd[1]=0;
-			if (tailSize>0) {
-				tail[0].future_direction[tail[0].futureIndex]=RIGHT;
-				tail[0].frameCount[tail[0].futureIndex]=TAIL_DISTANCE;
-				tail[0].futureIndex=(tail[0].futureIndex+1)%TAIL_DISTANCE;
-			}
 		}
 		if (GetKey(olc::S).bPressed&&(meercaSpd[0]+meercaSpd[1]==0||meercaSpd[0]!=0)) {
 			meercaSpd[0]=0;
 			meercaSpd[1]=moveSpd;
-			if (tailSize>0) {
-				tail[0].future_direction[tail[0].futureIndex]=DOWN;
-				tail[0].frameCount[tail[0].futureIndex]=TAIL_DISTANCE;
-				tail[0].futureIndex=(tail[0].futureIndex+1)%TAIL_DISTANCE;
-			}
 		}
 		// called once per frame
 		if (meercaSpd[0]==moveSpd) {
@@ -172,43 +148,34 @@ public:
 		for (int i=0;i<badNeggCount;i++) {
 			DrawRotatedDecal({badNeggs[i*2],badNeggs[i*2+1]},badnegg,0,{16,16},{1,1});
 		}
+		if (tailSize>=1) {
+			DrawString({16,16},to_string(meercaPreviousPos[3])+" "+to_string(meercaPreviousPos[2])+" "+to_string(meercaPreviousPos[1])+" "+to_string(meercaPreviousPos[0]));
+		}
 		for (int i=0;i<tailSize;i++) {
-			TailData t = tail[i];
-			DrawCircle({t.pos[0],t.pos[1]},8);
+			if (meercaPreviousPos[(i*8+6)]!=0||meercaPreviousPos[(i*8+7)]!=0) {
+				DrawCircle({(float)meercaPreviousPos[(i*8+6)],(float)meercaPreviousPos[(i*8+7)]},8);
+			}
 		}
 		return true;
 	}
 
 	void updateGame() {
+		for (int i=tailSize*8-2;i>=0;i-=2) {
+			if (i==0) {
+				meercaPreviousPos[i]=meercaPos[0];
+				meercaPreviousPos[i+1]=meercaPos[1];
+			} else {
+				meercaPreviousPos[i]=meercaPreviousPos[i-2];
+				meercaPreviousPos[i+1]=meercaPreviousPos[i-1];
+			}
+		}
 		meercaPos[0]+=meercaSpd[0];
 		meercaPos[1]+=meercaSpd[1];
 
 		if (abs(meercaPos[0]-neggPos[0])<8&&abs(meercaPos[1]-neggPos[1])<8) {
 			assignNeggRandomPos();
-			tail=(TailData*)realloc(tail,sizeof(TailData)*++tailSize);
-			tail[tailSize-1].future_direction = (char*)malloc(sizeof(char)*TAIL_DISTANCE);
-			tail[tailSize-1].pos = (int*)malloc(sizeof(int)*2);
-			tail[tailSize-1].frameCount = (int*)malloc(sizeof(int)*TAIL_DISTANCE);
-			if (meercaSpd[0]==moveSpd) {
-				tail[tailSize-1].direction=RIGHT;
-			} else 
-			if (meercaSpd[0]==-moveSpd) {
-				tail[tailSize-1].direction=LEFT;
-			} else 
-			if (meercaSpd[1]==moveSpd) {
-				tail[tailSize-1].direction=DOWN;
-			} else 
-			if (meercaSpd[1]==-moveSpd) {
-				tail[tailSize-1].direction=UP;
-			}
-			tail[tailSize-1].pos[0]=meercaPos[0];
-			tail[tailSize-1].pos[1]=meercaPos[1];
-			for (int i=0;i<TAIL_DISTANCE;i++) {
-				tail[tailSize-1].frameCount[i]=-1;
-				tail[tailSize-1].future_direction[i]=-1;
-			}
-			tail[tailSize-1].waitTime=TAIL_DISTANCE*tailSize;
-			tail[tailSize-1].futureIndex=0;
+			tailSize++;
+			meercaPreviousPos=(float*)realloc(meercaPreviousPos,sizeof(float)*tailSize*8);
 			if ((float)rand()/(float)RAND_MAX<0.6) {
 				spawnBadNegg();
 			}
@@ -218,39 +185,6 @@ public:
 				init();
 			}	
 		}
-		for (int i=0;i<tailSize;i++) {
-			if (tail[i].waitTime>0) {
-				tail[i].waitTime--;
-			} else {
-				for (int j=0;j<TAIL_DISTANCE;j++) {
-					if (tail[i].frameCount[j]>=0) {
-						tail[i].frameCount[j]--;
-						if (tail[i].frameCount[j]==-1) {
-							tail[i].direction=tail[i].future_direction[j];
-							if (i+1<tailSize) {
-								tail[i+1].future_direction[tail[i+1].futureIndex]=tail[i].future_direction[j];
-								tail[i+1].frameCount[tail[i+1].futureIndex]=TAIL_DISTANCE;
-								tail[i+1].futureIndex=(tail[i+1].futureIndex+1)%TAIL_DISTANCE;
-							}
-						}
-					}
-				}
-				switch (tail[i].direction) {
-					case UP:{
-						tail[i].pos[1]-=moveSpd;
-					}break;
-					case RIGHT:{
-						tail[i].pos[0]+=moveSpd;
-					}break;
-					case LEFT:{
-						tail[i].pos[0]-=moveSpd;
-					}break;
-					case DOWN:{
-						tail[i].pos[1]+=moveSpd;
-					}break;
-				}
-			}
-		}
 	}
 };