1 files changed, 88 insertions, 0 deletions
diff --git a/src/opengl/renderer.cpp b/src/opengl/renderer.cpp
new file mode 100644
index 0000000..1898753
--- /dev/null
+++ b/src/opengl/renderer.cpp
@@ -0,0 +1,88 @@
+#include "renderer.hpp"
+#include <iostream>
+
+
+void GLAPIENTRY MessageCallback( GLenum source,
+                 GLenum type,
+                 GLuint id,
+                 GLenum severity,
+                 GLsizei length,
+                 const GLchar* message,
+                 const void* userParam )
+{
+  std::cerr << "GL CALLBACK" <<
+		  (type == GL_DEBUG_TYPE_ERROR ? "(ERROR):" : "(UNKNOWN):") <<
+				  " type="<< std::showbase << std::hex << type <<
+				  " severity="<< severity << " message=" << message << std::endl;
+
+
+}
+
+Renderer::Renderer(short width,short height): Width(width),Height(height), ClockStart(steady_clock::now()){
+	// Init OpenGl
+	glewInit();
+	glEnable(GL_DEPTH_TEST);
+	glDepthFunc(GL_LESS);
+	glEnable              ( GL_DEBUG_OUTPUT );
+	glDebugMessageCallback( MessageCallback, 0 );
+
+	// Create screen quad
+	glGenVertexArrays(1,&VAO);
+	glBindVertexArray(VAO);
+	GLuint vertexbuffer;
+	glGenBuffers(1, &vertexbuffer);
+	glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer);
+	float square[]{
+			-1,1,0,
+			1,1,0,
+			-1,-1,0,
+
+			-1,-1,0,
+			1,1,0,
+			1,-1,0
+
+	};
+	glBufferData(GL_ARRAY_BUFFER, 6*3*sizeof(float), square, GL_STATIC_DRAW);
+	glEnableVertexAttribArray(0);
+	glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,3*sizeof(float),(void*)0);
+	glBindVertexArray(0);
+	LoadShader("square.glsl");
+}
+
+void Renderer::Render(){
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	glUseProgram(RayMarchingShader);
+	MProjection=glm::ortho(-10.0f,10.0f,-10.0f,10.0f,0.f,100.0f);
+	MModel=glm::scale(glm::mat4(1.0f),glm::vec3(10,10,1));
+	glUniformMatrix4fv(UProjection, 1, GL_FALSE, &MProjection[0][0]);
+	glUniformMatrix4fv(UModel, 1, GL_FALSE, &MModel[0][0]);
+	ClockCurrent = std::chrono::steady_clock::now();
+	duration<double> time_span = duration_cast<duration<double>>(ClockCurrent - ClockStart);
+	glUniform1f(UTime, time_span.count());
+
+	glUniform2f(UResolution,Width,Height);
+	glBindVertexArray(VAO);
+	glDrawArrays(GL_TRIANGLES,0,6);
+	glBindVertexArray(0);
+	glUseProgram(0);
+}
+
+void Renderer::UpdateShader(std::string name){
+	glDeleteProgram(RayMarchingShader);
+	LoadShader(name);
+}
+
+void Renderer::LoadShader(std::string name){
+	RayMarchingShader = CompileShader("square.glsl");
+	RayMarchingShader = CompileShader("square.glsl");
+	UProjection = glGetUniformLocation(RayMarchingShader, "projection");
+	UModel = glGetUniformLocation(RayMarchingShader, "model");
+	UResolution = glGetUniformLocation(RayMarchingShader, "resolution");
+	UTime = glGetUniformLocation(RayMarchingShader, "time");
+}
+
+void Renderer::AjustViewport(short width,short height){
+	glViewport(0, 0, width,height);
+	this->Width=width;
+	this->Height=height;
+}