Nove repo opengl-learning

2021-02-12 15:43:03 +01:00
commit 63e3c0bc8b
1046 changed files with 358397 additions and 0 deletions
--- a/DebugDrawer.cpp
+++ b/DebugDrawer.cpp
@@ -0,0 +1,121 @@
+#include "DebugDrawer.h"
+#include <GLAD/glad.h>
+#include <iostream>
+#include <glm/gtc/type_ptr.hpp>
+
+DebugDrawer::DebugDrawer() : 
+	vertexShaderSource(
+		"#version 330 core\n"
+		"layout(location = 0) in vec3 aPos;\n"
+		"layout(location = 1) in vec3 aColor;\n"
+		"uniform mat4 PVM;\n"
+		"out vec3 Color;\n"
+		"void main()\n"
+		"{\n"
+		"	gl_Position = PVM * vec4(aPos.xyz, 1.0);\n"
+		"	Color = aColor;\n"
+		"}\0"),
+	fragmentShaderSource(
+		"#version 330 core\n"
+		"out vec4 FragColor;\n"
+		"in vec3 Color;\n"
+		"void main()\n"
+		"{\n"
+		"	FragColor = vec4(Color, 1.0f);\n"
+		"}\0"), 
+	CoordLineLength(10.0f), coordLinesVertices(NULL)
+{
+	int  success;
+	char infoLog[512];
+
+	unsigned int vertexShader = glCreateShader(GL_VERTEX_SHADER);
+	glShaderSource(vertexShader, 1, &vertexShaderSource, NULL);
+	glCompileShader(vertexShader);
+	glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
+	if (!success)
+	{
+		glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
+		std::cerr << "DebugDrawer.h: [ERROR] Vertex shader compilation failed!\n" << infoLog << std::endl;
+	}
+
+	unsigned int fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
+	glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL);
+	glCompileShader(fragmentShader);
+	glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);
+	if (!success)
+	{
+		glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
+		std::cerr << "DebugDrawer.h: [ERROR] Fragment shader compilation failed!\n" << infoLog << std::endl;
+	}
+
+	Program = glCreateProgram();
+	glAttachShader(Program, vertexShader);
+	glAttachShader(Program, fragmentShader);
+	glLinkProgram(Program);
+	glGetProgramiv(Program, GL_LINK_STATUS, &success);
+	if (!success)
+	{
+		glGetProgramInfoLog(Program, 512, NULL, infoLog);
+		std::cerr << "DebugDrawer.h: [ERROR] Program linking failed\n" << infoLog << std::endl;
+	}
+
+	glDeleteShader(vertexShader);
+	glDeleteShader(fragmentShader);
+
+	glGenVertexArrays(1, &VAO);
+	glGenBuffers(1, &VBO);
+	updateDebugLineVertices();	
+	
+	glBindVertexArray(VAO);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (const void*)0);
+	glEnableVertexAttribArray(0);
+	glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (const void*)(3 * sizeof(float)));
+	glEnableVertexAttribArray(1);
+	glBindVertexArray(0);
+}
+void DebugDrawer::updateDebugLineVertices()
+{
+	if (coordLinesVertices != NULL)
+		delete[] coordLinesVertices;
+
+	coordLinesVertices = new float[72]{
+		 -CoordLineLength, 0.0f, 0.0f,	0.5f, 0.0f, 0.0f,
+		  0.0f, 0.0f, 0.0f,				0.5f, 0.0f, 0.0f,
+		  0.0f, 0.0f, 0.0f,				1.0f, 0.0f, 0.0f,
+		  CoordLineLength, 0.0f, 0.0f,	1.0f, 0.0f, 0.0f,  
+
+		 0.0f, -CoordLineLength, 0.0f,	0.0f, 0.5f, 0.0f,
+		 0.0f, 0.0f, 0.0f,				0.0f, 0.5f, 0.0f,
+		 0.0f, 0.0f, 0.0f,				0.0f, 1.0f, 0.0f,
+		 0.0f,  CoordLineLength, 0.0f,	0.0f, 1.0f, 0.0f,
+
+		 0.0f, 0.0f, -CoordLineLength,	0.0f, 0.0f, 0.5f,
+		 0.0f, 0.0f, 0.0f,				0.0f, 0.0f, 0.5f,
+		 0.0f, 0.0f, 0.0f,				0.0f, 0.0f, 1.0f,
+		 0.0f, 0.0f,  CoordLineLength,	0.0f, 0.0f, 1.0f
+	};
+
+	glBindVertexArray(VAO);
+	glBindBuffer(GL_ARRAY_BUFFER, VBO);
+	glBufferData(GL_ARRAY_BUFFER, 72 * sizeof(float), coordLinesVertices, GL_STATIC_DRAW);
+}
+void DebugDrawer::ChangeCoordLineLength(float len)
+{
+	CoordLineLength = len;
+	updateDebugLineVertices();
+}
+void DebugDrawer::DrawCoordLines(glm::mat4 PVM)
+{
+	glUseProgram(Program);
+	glUniformMatrix4fv(glGetUniformLocation(Program, "PVM"), 1, GL_FALSE, glm::value_ptr(PVM));
+	glBindVertexArray(VAO);
+	glDrawArrays(GL_LINES, 0, 12);
+	glBindVertexArray(0);
+}
+DebugDrawer::~DebugDrawer()
+{
+	glDeleteVertexArrays(1, &VAO);
+	glDeleteBuffers(1, &VBO);
+	glDeleteProgram(Program);
+	delete[] coordLinesVertices;
+}