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Quiz

  1. Could you please talk more about the Convex sum representation of a triangle? x 2

    Sure. It's a weighted average of the three vertices. If the vertices are A,B,C, and the weights are a,b,c, with a+b+c=1 and a,b,c ≥ 0, then P=aA+bB+cC is a point in the triangle. I'll draw some examples.

  2. Is the convex sum idea similar to how we calculate a coordinate 1/4 the distance from point A to B (P(1/4) = A(3/4) + B(1/4))?

    Yes, exactly right!

  3. I understand that parameter t is the representation of how far you are between A and B, but I don't quite understand parameter s. If parameter T puts us in a specific place between A and B, isn't s dependent on t?

    No, it's a different, independent parameter. I'll draw some pictures.

  4. What is the difference between brightness and saturation?

    Great question; those two are easy to confuse. I like to think of "saturation" as the opposite of "pastel", where pastels are near to white/gray, while saturated colors have an intense hue and are far from white/gray.

    Meanwhile, brightness has to do with the distance between black and white: more light.

    Consider a medium pink. You can add more red and make it brighter and more saturated. You can add more green and blue and make it brighter and less saturated.

    Or, with the same medium pink, you could reduce the red and turn up the green and blue, keeping the brightness the same, and making it less saturated.