Create Example_-_Breadcrumb.c

ai/Example_-_Breadcrumb.c

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+
+#define MAX_PATH 32
+
+#include "raylib.h"
+#include <math.h>
+
+static int mapWidth = 20;
+static int mapHeight = 10;
+static float tileWidth;
+static float tileHeight;
+
+// This is our tile map. Note that [y][x]!!
+int map[10][20] = { {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1},
+                    {1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,1,1,1,1},
+                    {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1},
+                    {1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,1,1,1,1},
+                    {1,1,1,1,1,1,1,1,0,1,1,1,1,0,0,1,1,1,1,1},
+                    {1,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1},
+                    {1,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1},
+                    {1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,0,0,0,1},
+                    {1,0,0,0,0,0,0,1,0,0,0,1,1,1,1,0,0,0,0,1},
+                    {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}};  
+
+typedef struct player{
+    bool active;
+    int x;
+    int y;
+    int pathx[MAX_PATH];
+    int pathy[MAX_PATH];
+}player;
+
+static player p;
+static void dropbreadcrumb(void);
+
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib example.");
+ 
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    p.active = true;
+    p.x = 5;
+    p.y = 5;
+    for(int i=MAX_PATH-1;i>-1;i-=1){
+        p.pathx[i]=-1;
+        p.pathy[i]=-1;
+    }
+    dropbreadcrumb();
+    tileWidth = abs((float)screenWidth/(float)mapWidth);
+    tileHeight = abs((float)screenHeight/(float)mapHeight);
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if(IsKeyReleased(KEY_UP) &&     map[p.y-1][p.x]==0){
+            p.y-=1;
+            dropbreadcrumb();
+        }
+        if(IsKeyReleased(KEY_DOWN) &&   map[p.y+1][p.x]==0){
+            p.y+=1;
+            dropbreadcrumb();
+        }
+        if(IsKeyReleased(KEY_LEFT) &&   map[p.y][p.x-1]==0){
+            p.x-=1;
+            dropbreadcrumb();
+        }
+        if(IsKeyReleased(KEY_RIGHT) &&  map[p.y][p.x+1]==0){
+            p.x+=1;
+            dropbreadcrumb();
+        }
+        //----------------------------------------------------------------------------------
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+            
+            //
+            // Draw our tilemap.
+            for(int y=0;y<10;y++){
+                for(int x=0;x<20;x++){
+                    if(map[y][x]==1){
+                        DrawRectangle(x*tileWidth,y*tileHeight,tileWidth,tileHeight,BLACK);
+                    }
+                }
+            }
+            // Draw our breadcrumb
+            for(int i=0;i<MAX_PATH;i++){
+                if(p.pathx[i]>-1)
+                DrawRectangle(  p.pathx[i]*tileWidth+tileWidth/4,p.pathy[i]*tileHeight+tileHeight/4,
+                                tileWidth-tileWidth/2,tileHeight-tileHeight/2,(Color){50,50,50,255-(255.0f/32.0f)*i});
+            }
+            // Draw our player
+            DrawRectangle(p.x*tileWidth,p.y*tileHeight,tileWidth,tileHeight,BLUE);
+            
+            //
+            //
+            DrawText("BreadCrumb Example. Use cursor keys to move around.",0,0,20,GRAY);
+            
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+
+
+}
+
+void dropbreadcrumb(){
+    // first shift the path one step down.
+    for(int i=MAX_PATH-1;i>0;i--){
+        p.pathx[i] = p.pathx[i-1];
+        p.pathy[i] = p.pathy[i-1];
+    }
+    // insert the current position to the top of the path array.
+    p.pathx[0] = p.x;
+    p.pathy[0] = p.y;
+}