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