unsigned int shaderProgram;
unsigned int vbo[2];

static const char* vertexSource = R"(
    #version 330
    precision highp float;

    uniform mat4 MVP;
    layout(location=0) in vec2 vtxPos;
    layout(location=1) in vec3 vtxColor;
    out vec3 color;

    void main(){
        gl_Position = vec4(vtxPos.x, vtxPos.y, 0, 1);
        color = vtxColor;
    }
)";

static const char* fragmentSource = R"(
    #version 330
    precision highp float;

    in vec3 color;
    out vec4 finalColor;

    void main(){
        finalcolor = vec4(color, 1);
    }
)";

unsigned int vertexShader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vertexShader, 1, &vertexSource, NULL);
glCompileShader(vertexShader);

unsigned int fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fragmentShader, 1, &fragmentSource, NULL);
glCompileShader(fragmentShader);

shaderProgram = glCreateProgram();
glAttachShader(shaderProgram, vertexShader);
glAttachShader(shaderProgram, fragmentShader);
glBindFragDataLocation(shaderProgram, 0, "finalColor");
glLinkProgram(shaderProgram);
glUseProgram(shaderProgram);

//erre se emlékszem
float vertices[] = {};
//szinek
float colors[] = {};

glGenBuffers(2, &vbo[0]);
glBindBuffer(GL_ARRAY_BUFFER, vbo[0]);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, NULL);

glBindBuffer(GL_ARRAY_BUFFER, vbo[1]);
glBufferData(GL_ARRAY_BUFFER, sizeof(colors), colors, GL_STATIC_DRAW);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0, NULL);

//nememlekszem az adatokra, de a koordináta rendszer szerint kell kitölteni ahol a háromszög volt
int wCx = 60; (ha -30;+30 között van)
int wCy = 60; (szintén)
mat4 MVPtrans(2/wCx,0,0,0, 0,2/wCy,0,0, 0,0,1,0, 0,0,0,1);

int location = glGetUniformLocation(shaderProgram, "MVP");
glUniformMatrix4f(location, 1, GL_TRUE, MVPtrans);

glClearColor(0,0,0,0);
glClear(COLOR_BUFFER_BIT);

glDrawArrays(GL_TRIANGLES, 0, 3);
glutSwapBuffers();