cube-game-plus-plus/client/Utils.cpp

#include <GL/glew.h>
#include <iostream>
#include <iomanip>

#include "client/Utils.h"

bool checkAndPrintError(const char* message)
{
    GLenum error = glGetError();
    switch(error)
    {
        case GL_NO_ERROR: 
            return false;
        case GL_INVALID_ENUM: 
            std::cout << message << ": an unacceptable value is specified for an enumerated argument.\n";
            break;
        case GL_INVALID_VALUE: 
            std::cout << message << ": a numeric argument is out of range.\n";
            break;
        case GL_INVALID_OPERATION: 
            std::cout << message << ": the specified operation is not allowed in the current state.\n";
            break;
        case GL_INVALID_FRAMEBUFFER_OPERATION: 
            std::cout << message << ": the framebuffer object is not complete.\n";
            break;
        case GL_OUT_OF_MEMORY: 
            std::cout << message << ": there is not enough memory left to execute the command.\n";
            break;
        case GL_STACK_UNDERFLOW: 
            std::cout << message << ": an attempt has been made to perform an operation that would cause an internal stack to underflow.\n";
            break;
        case GL_STACK_OVERFLOW: 
            std::cout << message << ": an attempt has been made to perform an operation that would cause an internal stack to overflow.\n";
            break;
        default:
            std::cout << message << ": unknown OpenGL error: " << error << "\n";
    }
    return true;
}

float interpolate(float lag, float from, float to)
{
    return from + lag * (to - from);
}

void printMatrix(const float* data)
{
    std::cout << "MatrixData\n(\n";
    std::cout << std::fixed << std::setprecision(5);
    for(int i = 0; i < 4; i++)
    {
        std::cout << std::setw(15);
        std::cout << data[i] << ", ";
        std::cout << std::setw(15);
        std::cout << data[i + 4] << ", ";
        std::cout << std::setw(15);
        std::cout << data[i + 8] << ", ";
        std::cout << std::setw(15);
        std::cout << data[i + 12] << "\n";
    }
    std::cout << std::defaultfloat;
    std::cout << ")\n";
}