In Chili's tutorial series years ago he taught us how to make a draw line function early on. I quit programming for quite and awhile and so I am going back through he new series again to brush up on my skills. I noticed that in this new series he does not show a draw line function. I've only made it to lesson 20 of the beginner series this may be something that he does indeed show later but I have yet to see it. I have found an excellent draw line function that works flawlessly(so far) and I just wanted to share it with the group.

**Code:**

void Graphics::DrawLine(float x1, float y1, float x2, float y2, Color & color)

{

const bool steep = (fabs(y2 - y1) > fabs(x2 - x1));

if (steep)

{

std::swap(x1, y1);

std::swap(x2, y2);

}

if (x1 > x2)

{

std::swap(x1, x2);

std::swap(y1, y2);

}

const float dx = x2 - x1;

const float dy = fabs(y2 - y1);

float error = dx / 2.0f;

const int ystep = (y1 < y2) ? 1 : -1;

int y = (int)y1;

const int maxX = (int)x2;

for (int x = (int)x1; x<maxX; x++)

{

if (steep)

{

PutPixel(y, x, color);

}

else

{

PutPixel(x, y, color);

}

error -= dy;

if (error < 0)

{

y += ystep;

error += dx;

}

}

}