Refactor entity input system

engine/tests/pan_test.c

@@ -0,0 +1,104 @@
+/*******************************************************************************************
+*
+*   raylib [2D] example - world space panning
+*
+*   Welcome to raylib!
+*
+*   To test examples, just press F6 and execute raylib_compile_execute script
+*   Note that compiled executable is placed in the same folder as .c file
+*
+*   You can find all basic examples on C:\raylib\raylib\examples folder or
+*   raylib official webpage: www.raylib.com
+*
+*   Enjoy using raylib. :)
+*
+*   This example has been created using raylib 3.5 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2013-2016 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+#include "raymath.h"
+
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [2d] example - world space panning");
+
+    Camera2D cam = { 0 };
+    cam.zoom = 1;
+    cam.offset.x = GetScreenWidth() / 2.0f;
+    cam.offset.y = GetScreenHeight() / 2.0f;
+
+    Vector2 prevMousePos = GetMousePosition();
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        float mouseDelta = GetMouseWheelMove();
+
+        float newZoom = cam.zoom + mouseDelta * 0.01f;
+        if (newZoom <= 0)
+            newZoom = 0.01f;
+
+        cam.zoom = newZoom;
+
+        Vector2 thisPos = GetMousePosition();
+
+        Vector2 delta = Vector2Subtract(prevMousePos, thisPos);
+        prevMousePos = thisPos;
+
+        if (IsMouseButtonDown(0))
+            cam.target = GetScreenToWorld2D(Vector2Add(cam.offset, delta),cam);
+
+        if (IsKeyPressed(KEY_LEFT))
+            cam.rotation += 10;
+        else if (IsKeyPressed(KEY_RIGHT))
+            cam.rotation -= 10;
+
+        BeginDrawing();
+
+        ClearBackground(RAYWHITE);
+
+        BeginMode2D(cam);
+
+        float size = 5000;
+
+        for (float i = -size; i <= size; i += 10)
+        {
+            DrawLine(i, -size, i, size, GRAY);
+            DrawLine(-size, i, size, i, GRAY);
+        }
+
+        DrawLine(-size, 0, size, 0, RED);
+        DrawLine(0, -size, 0, size, RED);
+
+        Vector2 mapGrid = GetScreenToWorld2D(GetMousePosition(), cam);
+        mapGrid.x = floorf(mapGrid.x / 10) * 10.0f;
+        mapGrid.y = floorf(mapGrid.y / 10) * 10.0f;
+
+        DrawRectangle(mapGrid.x, mapGrid.y, 10, 10, BLUE);
+
+        EndMode2D();
+
+        DrawText(TextFormat("%4.0f %4.0f", mapGrid.x, mapGrid.y),10, 10, 20, BLACK);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}