From 20f8b1e2851d6e6c5313a3437bf067d6f488c0d1 Mon Sep 17 00:00:00 2001
From: Colin McMillen <colin@semicolin.games>
Date: Thu, 29 Jun 2023 16:01:49 -0400
Subject: [PATCH] load multiple textures, one for every JPG in the input
 directory

---
 Program.cs | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/Program.cs b/Program.cs
index 8c65524..87f1954 100644
--- a/Program.cs
+++ b/Program.cs
@@ -6,6 +6,7 @@ using OpenTK.Windowing.GraphicsLibraryFramework;
 // https://docs.sixlabors.com/api/ImageSharp/SixLabors.ImageSharp.Image.html
 using SixLabors.ImageSharp;
 using SixLabors.ImageSharp.Metadata.Profiles.Exif;
+using System.IO;
 using System.Reflection.Metadata;
 using System.Runtime.CompilerServices;
 using static System.Runtime.InteropServices.JavaScript.JSType;
@@ -191,7 +192,8 @@ public class Game : GameWindow {
   int VertexBufferObject;
   int ElementBufferObject;
   int VertexArrayObject;
-  Texture texture;
+  List<Texture> textures;
+  int textureIndex = 0;
   Shader shader;
   Matrix4 projection;
 
@@ -239,7 +241,13 @@ public class Game : GameWindow {
     GL.VertexAttribPointer(texCoordLocation, 2, VertexAttribPointerType.Float, false, 5 * sizeof(float), 3 * sizeof(float));
 
     // Load textures from JPEGs.
-    texture = new Texture(@"c:\users\colin\pictures\photos\2023\06\27\DSC_0035.jpg");
+    string[] files = Directory.GetFiles(@"c:\users\colin\pictures\photos\2023\06\27\");
+    textures = new List<Texture>();
+    foreach (string file in files) {
+      if (file.ToLower().EndsWith(".jpg")) {
+        textures.Add(new Texture(file));
+      }      
+    }
   }
 
   protected override void OnUnload() {
@@ -252,7 +260,7 @@ public class Game : GameWindow {
     GL.Clear(ClearBufferMask.ColorBufferBit);
     GL.BindVertexArray(VertexArrayObject);
     GL.ActiveTexture(TextureUnit.Texture0);
-    GL.BindTexture(TextureTarget.Texture2D, texture.Handle);
+    GL.BindTexture(TextureTarget.Texture2D, textures[textureIndex].Handle);
     shader.Use();
     GL.DrawElements(PrimitiveType.Triangles, indices.Length, DrawElementsType.UnsignedInt, 0);
     SwapBuffers();