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Moved from @raysan5/raylib/docs

1 files changed, 132 insertions, 0 deletions

diff --git a/examples/web/core/core_3d_picking.c b/examples/web/core/core_3d_picking.c
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+++ b/examples/web/core/core_3d_picking.c
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+/*******************************************************************************************
+*
+*   raylib [core] example - Picking in 3d mode (adapted for HTML5 platform)
+*
+*   This example has been created using raylib 1.3 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2015 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#if defined(PLATFORM_WEB)
+    #include <emscripten/emscripten.h>
+#endif
+
+//----------------------------------------------------------------------------------
+// Global Variables Definition
+//----------------------------------------------------------------------------------
+int screenWidth = 800;
+int screenHeight = 450;
+
+// Define the camera to look into our 3d world
+Camera camera;
+
+Vector3 cubePosition = { 0.0f, 1.0f, 0.0f };
+Vector3 cubeSize = { 2.0f, 2.0f, 2.0f };
+
+Ray ray;        // Picking line ray
+
+bool collision = false;
+
+//----------------------------------------------------------------------------------
+// Module Functions Declaration
+//----------------------------------------------------------------------------------
+void UpdateDrawFrame(void);     // Update and Draw one frame
+
+//----------------------------------------------------------------------------------
+// Main Enry Point
+//----------------------------------------------------------------------------------
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    InitWindow(screenWidth, screenHeight, "raylib [core] example - 3d picking");
+	
+    camera.position = (Vector3){ 10.0f, 10.0f, 10.0f };  // Camera position
+    camera.target = (Vector3){ 0.0f, 0.0f, 0.0f };      // Camera looking at point
+    camera.up = (Vector3){ 0.0f, 1.0f, 0.0f };          // Camera up vector (rotation towards target)
+    camera.fovy = 45.0f;                                // Camera field-of-view Y
+
+    SetCameraMode(camera, CAMERA_FREE);                 // Set a free camera mode
+
+#if defined(PLATFORM_WEB)
+    emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
+#else
+    SetTargetFPS(60);   // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+    
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        UpdateDrawFrame();
+    }
+#endif
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
+
+//----------------------------------------------------------------------------------
+// Module Functions Definition
+//----------------------------------------------------------------------------------
+void UpdateDrawFrame(void)
+{
+    // Update
+    //----------------------------------------------------------------------------------
+    UpdateCamera(&camera);          // Update internal camera and our camera
+        
+    if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON))
+    {
+        // NOTE: This function is NOT WORKING properly!
+        ray = GetMouseRay(GetMousePosition(), camera);
+        
+        // TODO: Check collision between ray and box
+		collision = CheckCollisionRayBox(ray,
+                    (BoundingBox){(Vector3){ cubePosition.x - cubeSize.x/2, cubePosition.y - cubeSize.y/2, cubePosition.z - cubeSize.z/2 },
+                                  (Vector3){ cubePosition.x + cubeSize.x/2, cubePosition.y + cubeSize.y/2, cubePosition.z + cubeSize.z/2 }});
+    }
+    //----------------------------------------------------------------------------------
+
+    // Draw
+    //----------------------------------------------------------------------------------
+    BeginDrawing();
+
+        ClearBackground(RAYWHITE);
+
+        Begin3dMode(camera);
+
+            if (collision) 
+            {
+                DrawCube(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, RED);
+                DrawCubeWires(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, MAROON);
+
+                DrawCubeWires(cubePosition, cubeSize.x + 0.2f, cubeSize.y + 0.2f, cubeSize.z + 0.2f, GREEN);
+            }
+            else
+            {
+                DrawCube(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, GRAY);
+                DrawCubeWires(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, DARKGRAY);
+            }
+                
+            DrawRay(ray, MAROON);
+			
+            DrawGrid(10, 1.0f);
+
+        End3dMode();
+        
+        DrawText("Try selecting the box with mouse!", 240, 10, 20, DARKGRAY);
+		
+		if(collision) DrawText("BOX SELECTED", (screenWidth - MeasureText("BOX SELECTED", 30)) / 2, screenHeight * 0.1f, 30, GREEN);
+
+        DrawFPS(10, 10);
+
+    EndDrawing();
+    //----------------------------------------------------------------------------------
+}
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