Create racing.c

ai/racing/racing.c

@@ -0,0 +1,168 @@
+/*******************************************************************************************
+*
+
+* Trying to figure out how to do a racing game using lanes...
+*
+* I made a array of vector2d's, this in a circle as the racetrack.
+* there are 5 lanes. 5 bots that should be able to race against each other.
+*
+* work in progress or figure out yourself.
+*
+********************************************************************************************/
+
+#include "raylib.h"
+#include <math.h>
+
+#define MAXLANES 5
+#define MAXBOTS 5
+
+typedef struct thebot{
+    Vector2 position;
+    float speed;
+    int pos;
+    int lane;
+}thebot;
+
+static struct thebot bot[MAXBOTS];
+
+Vector2 track[5][360];
+
+void maketrack();
+void drawtrack();
+void updatebots();
+void drawbots();
+static float edistance(float x1,float y1,float x2,float y2);
+
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [core] example - basic window");
+    maketrack();
+    for(int i=0;i<MAXBOTS;i++){
+        bot[i].position = track[i][0];
+        bot[i].lane=i;
+        bot[i].pos = 0;
+        bot[i].speed = GetRandomValue(500,1000)/1000.0f;
+    }
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+
+    //track[0][0] = (Vector2){0,0};
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        // TODO: Update your variables here
+        //----------------------------------------------------------------------------------
+        updatebots();
+        updatebots();
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+        ClearBackground(RAYWHITE);
+
+
+        drawtrack();
+        drawbots();
+        //DrawText(FormatText("%f",(float)GetRandomValue(0,10000)/10000*2-1), 190, 200, 20, LIGHTGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
+
+void drawtrack(){
+    for(int i=1;i<360;i++){
+    for(int t=0;t<5;t++){
+        DrawLineV(track[t][i-1],track[t][i],BLACK);
+    }
+    }
+}
+
+void maketrack(){
+    float x = 0.0f;
+    float y = 0.0f;
+    for(int i=0;i<360;i++){
+    for(int t=0;t<5;t++){
+        track[t][i] = (Vector2){x+x/100*t*10.0f,y+y/100*t*10.0f};
+        track[t][i].x += 320;
+        track[t][i].y += 100;
+        track[t][i].y -= t*10;
+    }
+        x+=cos(i*DEG2RAD)*2;
+        y+=sin(i*DEG2RAD)*2;
+
+    }
+}
+
+void updatebots(){
+    for(int i=0;i<MAXBOTS;i++){
+        float l=edistance(      bot[i].position.x,
+                                bot[i].position.y,
+                                track[bot[i].lane][bot[i].pos].x,
+                                track[bot[i].lane][bot[i].pos].y);
+        if(l<5){
+            bot[i].pos+=1;
+            if(bot[i].pos>359)bot[i].pos=0;            
+        }
+        float an = atan2(bot[i].position.y-track[bot[i].lane][bot[i].pos].y,bot[i].position.x-track[bot[i].lane][bot[i].pos].x);
+        bot[i].position.x-=cos(an)*bot[i].speed;
+        bot[i].position.y-=sin(an)*bot[i].speed;
+        // Switch lane logic
+        bool close=false;
+        for(int j=0;j<MAXBOTS;j++){
+            if(j==i)continue;
+            float l=edistance(      bot[i].position.x,
+                                    bot[i].position.y,
+                                    bot[j].position.x,
+                                    bot[j].position.y);
+            if(l<20)close=true;
+        }
+        if(close==false){
+            if(bot[i].lane>0)bot[i].lane--;
+        }
+        // if overtake and only 2 close by
+        int cnt=0;
+        for(int j=0;j<MAXBOTS;j++){
+            if(j==i)continue;
+            float l=edistance(      bot[i].position.x,
+                                    bot[i].position.y,
+                                    bot[j].position.x,
+                                    bot[j].position.y);
+            if(l<20 && bot[j].speed<bot[i].speed)cnt++;
+        }
+        if(cnt==1){
+            if(bot[i].lane==0){
+                bot[i].lane++;
+                bot[i].pos++;
+            }
+        }
+    }    
+}
+
+void drawbots(){
+    for(int i=0;i<MAXBOTS;i++){
+        DrawCircleV(bot[i].position,5,RED);
+    }
+}
+
+// Euclidean distance (more precise)
+float edistance(float x1,float y1,float x2,float y2){
+    return sqrt( (x1-x2)*(x1-x2)+(y1-y2)*(y1-y2) );
+}