Removed Subrepository

2022-09-04 13:23:45 +02:00
parent f4a01d6a69
commit 2cdae71f61
109 changed files with 12072 additions and 1 deletions
--- a/C#/OpenGLTutorial/Rendering/Shaders/Shader.cs
+++ b/C#/OpenGLTutorial/Rendering/Shaders/Shader.cs
@@ -0,0 +1,103 @@
+using System;
+using System.IO;
+using System.Numerics;
+using System.Text;
+using System.Text.RegularExpressions;
+using static OpenGL.GL;
+
+namespace OpenGLTutorial.Rendering.Shaders {
+    public class Shader {
+        private readonly string _vertexCode;
+        private readonly string _fragmentCode;
+        private bool _loaded = false;
+
+        public uint Program { get; private set; }
+
+        public Shader(string vertexPath, string fragmentPath) {
+            using (var vertexReader = new StreamReader(vertexPath, Encoding.UTF8))
+                _vertexCode = vertexReader.ReadToEnd();
+            
+            using (var fragmentReader = new StreamReader(fragmentPath, Encoding.UTF8))
+                _fragmentCode = fragmentReader.ReadToEnd();
+        }
+
+        public Shader(string shader, bool isFile = true) {
+            using var reader = isFile ? new StreamReader(shader, Encoding.UTF8) : null;
+            string source = isFile ? reader.ReadToEnd() : shader;
+
+            string[] splitString = Regex.Split(source, "(#type [a-zA-Z]+)");
+            string firstPattern = splitString[1].Replace("#type ", "").Trim();
+            string secondPattern = splitString[3].Replace("#type ", "").Trim();
+
+            if (firstPattern.ToLower().Equals("vertex"))
+                _vertexCode = splitString[2];
+            else if (firstPattern.ToLower().Equals("fragment"))
+                _fragmentCode = splitString[2];
+            else throw new IOException("Unexpected token '" + firstPattern + "' in '" + shader + "'");
+            
+            if (secondPattern.ToLower().Equals("vertex"))
+                _vertexCode = splitString[4];
+            else if (secondPattern.ToLower().Equals("fragment"))
+                _fragmentCode = splitString[4];
+            else throw new IOException("Unexpected token '" + secondPattern + "' in '" + shader + "'");
+        }
+
+        public void Load() {
+            if (_loaded) return;
+            _loaded = true;
+            uint vs = glCreateShader(GL_VERTEX_SHADER);
+            glShaderSource(vs, _vertexCode);
+            glCompileShader(vs);
+            
+            int[] status = glGetShaderiv(vs, GL_COMPILE_STATUS, 1);
+            if (status[0] == 0) {
+                string error = glGetShaderInfoLog(vs);
+                throw new Exception("Error compiling vertex shader: " + error);
+            }
+
+            uint fs = glCreateShader(GL_FRAGMENT_SHADER);
+            glShaderSource(fs, _fragmentCode);
+            glCompileShader(fs);
+            
+            status = glGetShaderiv(fs, GL_COMPILE_STATUS, 1);
+            if (status[0] == 0) {
+                string error = glGetShaderInfoLog(fs);
+                throw new Exception("Error compiling fragment shader: " + error);
+            }
+
+            Program = glCreateProgram();
+            glAttachShader(Program, vs);
+            glAttachShader(Program, fs);
+            
+            glLinkProgram(Program);
+            
+            glDetachShader(Program, vs);
+            glDetachShader(Program, fs);
+            glDeleteShader(vs);
+            glDeleteShader(fs);
+        }
+
+        public void Use() {
+            glUseProgram(Program);
+        }
+
+        public void Delete() {
+            glUseProgram(0);
+            glDeleteProgram(Program);
+        }
+
+        public void SetMatrix4X4(string uniformName, Matrix4x4 matrix) {
+            int location = glGetUniformLocation(Program, uniformName);
+            glUniformMatrix4fv(location, 1, false, GetMatrix4X4Values(matrix));
+        }
+
+        private float[] GetMatrix4X4Values(Matrix4x4 m) {
+            return new [] {
+                m.M11, m.M12, m.M13, m.M14,
+                m.M21, m.M22, m.M23, m.M24,
+                m.M31, m.M32, m.M33, m.M34,
+                m.M41, m.M42, m.M43, m.M44
+            };
+        }
+    }
+}