When we create a sprite, we usually completely replace pixel values by those in the sprite. Suppose, however, we wish to replace pixel values by a combination with weights $\alpha$ from the original background, plus $(\alpha-1)$ from the sprite, where $\alpha$ is in $[0,1]$.
State how you could do this, using only LOGICAL operators and an ADD.
For this question, assume the following: (1) You already have a sprite $S_{\alpha}$ which has the character's colors all multiplied by the factor $\alpha$, and black outside the character;
(2) You already have a second image of the (entire) background, already multiplied by $(1-\alpha)$, called $B_{1-\alpha}$.
Answer:

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The Answer of When we create a sprite, we usually completely replace pixel values by those in the sprite. Suppose, however, we wish to replace pixel values by a combination with weights $\alpha$ from the original background, plus $(\alpha-1)$ from the sprite, where $\alpha$ is in $[0,1]$.
State how you could do this, using only LOGICAL operators and an ADD.
For this question, assume the following: (1) You already have a sprite $S_{\alpha}$ which has the character's colors all multiplied by the factor $\alpha$, and black outside the character;
(2) You already have a second image of the (entire) background, already multiplied by $(1-\alpha)$, called $B_{1-\alpha}$.
Answer:

When We Create a Sprite, We Usually Completely Replace Pixel α\alphaα

When We Create a Sprite, We Usually Completely Replace Pixel $\alpha$