Create Functions_-_getangle.c

Functions_-_getangle.c

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+
+#include "raylib.h"
+#include <math.h>
+
+// Get our angle between two points.
+static float getangle(float x1,float y1,float x2,float y2);
+
+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
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        
+        int x1 = GetMouseX();
+        int y1 = GetMouseY();
+        int x2 = screenWidth/2;
+        int y2 = screenHeight/2;
+        
+        //----------------------------------------------------------------------------------
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+            
+            DrawLine(x1,y1,x2,y2,RED);
+            
+            DrawText(FormatText("Angle between x1,y1,x2,y2 : %f",getangle(x1,y1,x2,y2)),0,0,20,DARKGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+
+
+}
+// Return the angle from - to in float
+float getangle(float x1,float y1,float x2,float y2){
+    return (float)atan2(y2-y1, x2-x1);
+}