add platformer window infrastructure

2018-04-08 20:29:20 -04:00
parent edb2985a98
commit f175dd84f4
12 changed files with 328 additions and 0 deletions
--- a/Platformer/PlatformWindow.cs
+++ b/Platformer/PlatformWindow.cs
@@ -0,0 +1,74 @@
+using System;
+using OpenTK;
+using OpenTK.Graphics.OpenGL4;
+using Platformer.Util;
+using Buffer = Platformer.Util.Buffer;
+
+namespace Platformer
+{
+    public class PlatformWindow : GameWindow
+    {
+        private Program _render;
+
+        private Buffer _vbo;
+        private Buffer _ibo;
+
+        private Vector4[] _verts;
+        private uint[] _inds;
+        private VertexArray _vao;
+
+        protected override void OnLoad(EventArgs e)
+        {
+            base.OnLoad(e);
+
+            _verts = new[]
+            {
+                new Vector4(-.5f, -.5f, +0, +1),
+                new Vector4(-.5f, +.5f, +0, +1),
+                new Vector4(+.5f, -.5f, +0, +1),
+                new Vector4(+.5f, +.5f, +0, +1),
+            };
+
+            _inds = new uint[]
+            {
+                0, 1, 2,
+            };
+
+            var vert = Shader.Compile("shaders/simple.vert");
+            var frag = Shader.Compile("shaders/simple.frag");
+
+            _render = Program.Link(vert, frag);
+
+            _vbo = new Buffer();
+            _vbo.SetData(_verts);
+
+            _ibo = new Buffer();
+            _ibo.SetData(_inds);
+
+            _vao = new VertexArray();
+            _vao.VertexPointer(_vbo, index: 0, size: 4);
+        }
+
+        protected override void OnRenderFrame(FrameEventArgs e)
+        {
+            base.OnRenderFrame(e);
+
+            GL.Clear(ClearBufferMask.ColorBufferBit);
+
+            GL.Viewport(ClientRectangle);
+
+            GL.UseProgram(_render);
+            GL.BindVertexArray(_vao);
+            GL.BindBuffer(BufferTarget.ElementArrayBuffer, _ibo);
+            GL.DrawElements(BeginMode.Triangles, _inds.Length, DrawElementsType.UnsignedInt, 0);
+            GL.Flush();
+
+            SwapBuffers();
+        }
+
+        protected override void OnUpdateFrame(FrameEventArgs e)
+        {
+            base.OnUpdateFrame(e);
+        }
+    }
+}