Update/merge examples back into main repo (#192)

Examples/Models/MeshGeneration.cs

@@ -0,0 +1,140 @@
+/*******************************************************************************************
+*
+*   raylib example - procedural mesh generation
+*
+*   This example has been created using raylib 1.8 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2017 Ramon Santamaria (Ray San)
+*
+********************************************************************************************/
+
+using System.Numerics;
+using static Raylib_cs.Raylib;
+
+namespace Examples.Models;
+
+public class MeshGeneration
+{
+    public static int Main()
+    {
+        // Initialization
+        //--------------------------------------------------------------------------------------
+        const int screenWidth = 800;
+        const int screenHeight = 450;
+
+        InitWindow(screenWidth, screenHeight, "raylib [models] example - mesh generation");
+
+        // We generate a isChecked image for texturing
+        Image isChecked = GenImageChecked(2, 2, 1, 1, Color.RED, Color.GREEN);
+        Texture2D texture = LoadTextureFromImage(isChecked);
+        UnloadImage(isChecked);
+
+        Model[] models = new Model[7];
+
+        models[0] = LoadModelFromMesh(GenMeshPlane(2, 2, 5, 5));
+        models[1] = LoadModelFromMesh(GenMeshCube(2.0f, 1.0f, 2.0f));
+        models[2] = LoadModelFromMesh(GenMeshSphere(2, 32, 32));
+        models[3] = LoadModelFromMesh(GenMeshHemiSphere(2, 16, 16));
+        models[4] = LoadModelFromMesh(GenMeshCylinder(1, 2, 16));
+        models[5] = LoadModelFromMesh(GenMeshTorus(0.25f, 4.0f, 16, 32));
+        models[6] = LoadModelFromMesh(GenMeshKnot(1.0f, 2.0f, 16, 128));
+
+        // Set isChecked texture as default diffuse component for all models material
+        for (int i = 0; i < models.Length; i++)
+        {
+            // Set map diffuse texture
+            Raylib.SetMaterialTexture(ref models[i], 0, MaterialMapIndex.MATERIAL_MAP_ALBEDO, ref texture);
+        }
+
+        // Define the camera to look into our 3d world
+        Camera3D camera = new();
+        camera.Position = new Vector3(5.0f, 5.0f, 5.0f);
+        camera.Target = new Vector3(0.0f, 0.0f, 0.0f);
+        camera.Up = new Vector3(0.0f, 1.0f, 0.0f);
+        camera.FovY = 45.0f;
+        camera.Projection = CameraProjection.CAMERA_PERSPECTIVE;
+
+        // Model drawing position
+        Vector3 position = new(0.0f, 0.0f, 0.0f);
+
+        int currentModel = 0;
+
+        SetTargetFPS(60);
+        //--------------------------------------------------------------------------------------
+
+        // Main game loop
+        while (!WindowShouldClose())
+        {
+            // Update
+            //----------------------------------------------------------------------------------
+            UpdateCamera(ref camera, CameraMode.CAMERA_ORBITAL);
+
+            if (IsMouseButtonPressed(MouseButton.MOUSE_LEFT_BUTTON))
+            {
+                // Cycle between the textures
+                currentModel = (currentModel + 1) % models.Length;
+            }
+            //----------------------------------------------------------------------------------
+
+            // Draw
+            //----------------------------------------------------------------------------------
+            BeginDrawing();
+            ClearBackground(Color.RAYWHITE);
+
+            BeginMode3D(camera);
+
+            DrawModel(models[currentModel], position, 1.0f, Color.WHITE);
+
+            DrawGrid(10, 1.0f);
+
+            EndMode3D();
+
+            DrawRectangle(30, 400, 310, 30, ColorAlpha(Color.SKYBLUE, 0.5f));
+            DrawRectangleLines(30, 400, 310, 30, ColorAlpha(Color.DARKBLUE, 0.5f));
+            DrawText("MOUSE LEFT BUTTON to CYCLE PROCEDURAL MODELS", 40, 410, 10, Color.BLUE);
+
+            switch (currentModel)
+            {
+                case 0:
+                    DrawText("PLANE", 680, 10, 20, Color.DARKBLUE);
+                    break;
+                case 1:
+                    DrawText("CUBE", 680, 10, 20, Color.DARKBLUE);
+                    break;
+                case 2:
+                    DrawText("SPHERE", 680, 10, 20, Color.DARKBLUE);
+                    break;
+                case 3:
+                    DrawText("HEMISPHERE", 640, 10, 20, Color.DARKBLUE);
+                    break;
+                case 4:
+                    DrawText("CYLINDER", 680, 10, 20, Color.DARKBLUE);
+                    break;
+                case 5:
+                    DrawText("TORUS", 680, 10, 20, Color.DARKBLUE);
+                    break;
+                case 6:
+                    DrawText("KNOT", 680, 10, 20, Color.DARKBLUE);
+                    break;
+                default:
+                    break;
+            }
+
+            EndDrawing();
+            //----------------------------------------------------------------------------------
+        }
+
+        // De-Initialization
+        //--------------------------------------------------------------------------------------
+        for (int i = 0; i < models.Length; i++)
+        {
+            UnloadModel(models[i]);
+        }
+
+        CloseWindow();
+        //--------------------------------------------------------------------------------------
+
+        return 0;
+    }
+}