engineer-thesis-WUT/Engine/engine/draw.hpp

// "Copyright [2023] <Krzysztof Rudnicki>"
#ifndef ENGINE_ENGINE_DRAW_HPP_
#define ENGINE_ENGINE_DRAW_HPP_
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include <string>
#include "./constants.hpp"

struct offsetsStruct {
    offsetsStruct(): xOffset(0), yOffset(0), zOffset(0) { }
    float xOffset, yOffset, zOffset;
};

struct drawFigureReturn {
    drawFigureReturn(): success(-1), VAO(0), VBO(0), EBO(0) { }
    int success;
    unsigned int VAO;
    unsigned int VBO;
    unsigned int EBO;
};

drawFigureReturn drawFigure(const int whatToDraw);

drawFigureReturn drawSquare(
    const float squareVertices[] = constants::SQUARE_VERTICES,
    const size_t squareVerticesSize = constants::SQUARE_VERTICES_SIZE,
    const unsigned int squareIndices[] = constants::SQUARE_INDICES,
    const size_t squareIndicesSize = constants::SQUARE_INDICES_SIZE,
    const char* vertexShaderSource = constants::VERTEX_SHADER_SOURCE,
    const char* fragmentShaderSource = constants::FRAGMENT_SHADER_SOURCE,
    const bool colorIncluded = false,
    const bool textureIncluded = false,
    const offsetsStruct offsets = offsetsStruct());

void doDrawElements(
    const unsigned int shaderProgram,
    const unsigned int vertexArrayObject,
    const GLenum drawArrayMode,
    const GLenum drawType,
    const int numberOfElementsToDraw);

drawFigureReturn drawTriangleClass(
    const float triangleVertices[],
    const size_t triangleVerticesSize,
    const char* vertexPath,
    const char* fragmentPath,
    const bool colorIncluded = false,
    const bool textureIncluded = false,
    const offsetsStruct offsets = offsetsStruct());

void updateUniformColor(
    const unsigned int shaderProgram,
    const GLchar* uniformName);

void doDrawArrays(
    const unsigned int shaderProgram,
    const unsigned int vertexArrayObject,
    const GLenum drawArrayMode,
    const int firstIndex,
    const unsigned int numberOfIndicesToBeRendered);

drawFigureReturn drawDebilMode(
    const char* vertexPath,
    const char* fragmentPath,
    const float vertices[],
    const size_t verticesSize,
    const unsigned int indices[],
    const size_t indicesSize);

#endif  // ENGINE_ENGINE_DRAW_HPP_