Add raylib lua examples

1 files changed, 96 insertions, 0 deletions

diff --git a/examples/core_3d_picking.lua b/examples/core_3d_picking.lua
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+-------------------------------------------------------------------------------------------
+--
+--  raylib [core] example - Picking in 3d mode
+--
+--  This example has been created using raylib 1.6 (www.raylib.com)
+--  raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+--
+--  Copyright (c) 2014-2016 Ramon Santamaria (@raysan5)
+--
+-------------------------------------------------------------------------------------------
+
+-- Initialization
+-------------------------------------------------------------------------------------------
+local screenWidth = 800
+local screenHeight = 450
+
+InitWindow(screenWidth, screenHeight, "raylib [core] example - 3d picking")
+
+-- Define the camera to look into our 3d world
+local camera = {}
+camera.position = Vector3(0.0, 10.0, 10.0)  -- Camera position
+camera.target = Vector3(0.0, 0.0, 0.0)      -- Camera looking at point
+camera.up = Vector3(0.0, 1.0, 0.0)          -- Camera up vector (rotation towards target)
+camera.fovy = 45.0                          -- Camera field-of-view Y
+
+local cubePosition = Vector3(0.0, 1.0, 0.0)
+local cubeSize = Vector3(2.0, 2.0, 2.0)
+
+local ray = Ray(Vector3(0, 0, 0), Vector3(0, 0, 0)) -- Picking line ray
+
+local collision = false
+
+SetCameraMode(CameraMode.FREE)         -- Set a free camera mode
+SetCameraPosition(camera.position) -- Set internal camera position to match our camera position
+SetCameraFovy(camera.fovy)         -- Set internal camera field-of-view Y
+
+SetTargetFPS(60)                   -- Set our game to run at 60 frames-per-second
+-------------------------------------------------------------------------------------------
+
+-- Main game loop
+while not WindowShouldClose() do            -- Detect window close button or ESC key
+    -- Update
+    ---------------------------------------------------------------------------------------
+    UpdateCamera(camera)           -- Update internal camera and our camera
+    
+    if (IsMouseButtonPressed(MOUSE.LEFT_BUTTON)) then
+        -- NOTE: This function is NOT WORKING properly!
+        ray = GetMouseRay(GetMousePosition(), camera)
+        
+        -- 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 }})
+    end
+    ---------------------------------------------------------------------------------------
+
+    -- Draw
+    ---------------------------------------------------------------------------------------
+    BeginDrawing()
+
+        ClearBackground(RAYWHITE)
+
+        Begin3dMode(camera)
+
+            if (collision) then
+                DrawCube(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, RED)
+                DrawCubeWires(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, MAROON)
+
+                DrawCubeWires(cubePosition, cubeSize.x + 0.2, cubeSize.y + 0.2, cubeSize.z + 0.2, GREEN)
+            else
+                DrawCube(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, GRAY)
+                DrawCubeWires(cubePosition, cubeSize.x, cubeSize.y, cubeSize.z, DARKGRAY)
+            end
+            
+            DrawRay(ray, MAROON)
+            
+            DrawGrid(10, 1.0)
+
+        End3dMode()
+        
+        DrawText("Try selecting the box with mouse!", 240, 10, 20, DARKGRAY)
+        
+        if (collision) then 
+            DrawText("BOX SELECTED", (screenWidth - MeasureText("BOX SELECTED", 30))/2, screenHeight*0.1, 30, GREEN)
+        end
+
+        DrawFPS(10, 10)
+
+    EndDrawing()
+    ---------------------------------------------------------------------------------------
+end
+
+-- De-Initialization
+-------------------------------------------------------------------------------------------
+CloseWindow()        -- Close window and OpenGL context
+-------------------------------------------------------------------------------------------
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