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nueva tabla high nibble 2bpp

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sejo 2022-02-09 17:08:49 -06:00
parent 05e302a7d5
commit 5fb42f51de
2 changed files with 44 additions and 38 deletions
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39
src/tutorial_de_uxn_día_2.gmo
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@ -859,31 +859,34 @@ el dispositivo de pantalla tratará esta dirección como un sprite 2bpp cuando u
¡veamos cómo utilizar el sprite byte para dibujar tiles de 2bpp!
### sprite de nibble alto para 2bpp
### nibble alto de sprite para 2bpp
el nibble alto para los sprites de 2bpp nos permitirá elegir la capa que queremos que se dibuje y la dirección de rotación.
los ocho valores posibles para este nibble son:
+ <table>
+ <tr><th>nibble alto</th><th>capa</th><th>inv-y</th><th>inv-x</th></tr>
+ <tr><td>8</td><td>plano de fondo</td><td>no</td><td>no</td></tr>
+ <tr><td>9</td><td>plano de fondo</td><td>no</td><td>sí</td></tr>
+ <tr><td>a</td><td>plano de fondo</td><td>sí</td><td>no</td></tr>
+ <tr><td>b</td><td>plano de fondo</td><td>sí</td><td>sí</td></tr>
+ <tr><td>c</td><td>primer plano</td><td>no</td><td>no</td></tr>
+ <tr><td>d</td><td>primer plano</td><td>no</td><td>sí</td></tr>
+ <tr><td>e</td><td>primer plano</td><td>sí</td><td>no</td></tr>
+ <tr><td>f</td><td>primer plano</td><td>sí</td><td>sí</td></tr>
+ <tr><th>sprite alto</th><th>capa</th><th>inv-y</th><th>inv-x</th></tr>
+ <tr><td class="num">8</td><td>fn</td><td>no</td><td>no</td></tr>
+ <tr><td class="num">9</td><td></td><td></td><td>sí</td></tr>
+ <tr><td class="num">a</td><td></td><td>sí</td><td>no</td></tr>
+ <tr><td class="num">b</td><td></td><td></td><td>sí</td></tr>
+ <tr><td class="num">c</td><td>pp</td><td>no</td><td>no</td></tr>
+ <tr><td class="num">d</td><td></td><td></td><td>sí</td></tr>
+ <tr><td class="num">e</td><td></td><td>sí</td><td>no</td></tr>
+ <tr><td class="num">f</td><td></td><td></td><td>sí</td></tr>
+ </table>
& * 8: dibujar un sprite de 2bpp en el fondo, con la orientación original
& * 9: dibujar un sprite de 2bpp en el fondo, invertido horizontalmente
& * a: dibujar un sprite 2bpp en el fondo, invertido verticalmente
& * b: dibujar un sprite de 2bpp en el fondo, invertido horizontal y verticalmente
& * c: dibujar un sprite de 2bpp en primer plano, con la orientación original
& * d: dibujar un sprite de 2bpp en primer plano, invertido horizontalmente
& * e: dibujar un sprite de 2bpp en primer plano, invertido verticalmente
& * f: dibujar un sprite de 2bpp en primer plano, invertido horizontal y verticalmente
& fondo:
& * 8: dibujar un sprite de 2bpp, con la orientación original
& * 9: dibujar un sprite de 2bpp, invertido horizontalmente
& * a: dibujar un sprite 2bpp, invertido verticalmente
& * b: dibujar un sprite de 2bpp, invertido horizontal y verticalmente
&
& primer plano:
& * c: dibujar un sprite de 2bpp, con la orientación original
& * d: dibujar un sprite de 2bpp, invertido horizontalmente
& * e: dibujar un sprite de 2bpp, invertido verticalmente
& * f: dibujar un sprite de 2bpp, invertido horizontal y verticalmente
notemos que estos ocho valores tienen todos un bit más a la izquierda en 1: este bit señala que vamos a dibujar un sprite de 2bpp. los otros tres bits del nibble se comportan como se ha descrito anteriormente en el caso de 1bpp.

43
src/uxn_tutorial_day_2.gmo
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@ -573,11 +573,11 @@ the eight possible values of the sprite high nibble, used for drawing a 1bpp spr
+ <table>
+ <tr><th>sprite high</th><th>layer</th><th>flip-y</th><th>flip-x</th></tr>
+ <tr><td class="num">0</td><td>bg</td><td>no</td><td>no</td></tr>
+ <tr><td class="num">0</td><td>background</td><td>no</td><td>no</td></tr>
+ <tr><td class="num">1</td><td></td><td></td><td>yes</td></tr>
+ <tr><td class="num">2</td><td></td><td>yes</td><td>no</td></tr>
+ <tr><td class="num">3</td><td></td><td></td><td>yes</td></tr>
+ <tr><td class="num">4</td><td>fg</td><td>no</td><td>no</td></tr>
+ <tr><td class="num">4</td><td>foreground</td><td>no</td><td>no</td></tr>
+ <tr><td class="num">5</td><td></td><td></td><td>yes</td></tr>
+ <tr><td class="num">6</td><td></td><td>yes</td><td>no</td></tr>
+ <tr><td class="num">7</td><td></td><td></td><td>yes</td></tr>
@ -590,7 +590,7 @@ the eight possible values of the sprite high nibble, used for drawing a 1bpp spr
&
& foreground:
& * 4: draw a 1bpp sprite, original orientation
& * 5: draw a 1bpp sprite, flipped horizontally
& * 5: draw a 1bpp sprite, flipped horizontally
& * 6: draw a 1bpp sprite, flipped vertically
& * 7: draw a 1bpp sprite, flipped horizontally and vertically
@ -866,24 +866,27 @@ the high nibble for 2bpp sprites will allow us to choose the layer we want it to
the eight possible values for this nibble are:
+ <table>
+ <tr><th>high nibble</th><th>layer</th><th>flip-y</th><th>flip-x</th></tr>
+ <tr><td>8</td><td>background</td><td>no</td><td>no</td></tr>
+ <tr><td>9</td><td>background</td><td>no</td><td>yes</td></tr>
+ <tr><td>a</td><td>background</td><td>yes</td><td>no</td></tr>
+ <tr><td>b</td><td>background</td><td>yes</td><td>yes</td></tr>
+ <tr><td>c</td><td>foreground</td><td>no</td><td>no</td></tr>
+ <tr><td>d</td><td>foreground</td><td>no</td><td>yes</td></tr>
+ <tr><td>e</td><td>foreground</td><td>yes</td><td>no</td></tr>
+ <tr><td>f</td><td>foreground</td><td>yes</td><td>yes</td></tr>
+ <tr><th>sprite high</th><th>layer</th><th>flip-y</th><th>flip-x</th></tr>
+ <tr><td class="num">8</td><td>background</td><td>no</td><td>no</td></tr>
+ <tr><td class="num">9</td><td></td><td></td><td>yes</td></tr>
+ <tr><td class="num">a</td><td></td><td>yes</td><td>no</td></tr>
+ <tr><td class="num">b</td><td></td><td></td><td>yes</td></tr>
+ <tr><td class="num">c</td><td>foreground</td><td>no</td><td>no</td></tr>
+ <tr><td class="num">d</td><td></td><td></td><td>yes</td></tr>
+ <tr><td class="num">e</td><td></td><td>yes</td><td>no</td></tr>
+ <tr><td class="num">f</td><td></td><td></td><td>yes</td></tr>
+ </table>
& * 8: draw a 2bpp sprite in the background, original orientation
& * 9: draw a 2bpp sprite in the background, flipped horizontally
& * a: draw a 2bpp sprite in the background, flipped vertically
& * b: draw a 2bpp sprite in the background, flipped horizontally and vertically
& * c: draw a 2bpp sprite in the foreground, original orientation
& * d: draw a 2bpp sprite in the foreground, flipped horizontally
& * e: draw a 2bpp sprite in the foreground, flipped vertically
& * f: draw a 2bpp sprite in the foreground, flipped horizontally and vertically
& background:
& * 8: draw a 2bpp sprite, original orientation
& * 9: draw a 2bpp sprite, flipped horizontally
& * a: draw a 2bpp sprite, flipped vertically
& * b: draw a 2bpp sprite, flipped horizontally and vertically
&
& foreground:
& * c: draw a 2bpp sprite, original orientation
& * d: draw a 2bpp sprite, flipped horizontally
& * e: draw a 2bpp sprite, flipped vertically
& * f: draw a 2bpp sprite, flipped horizontally and vertically
note that these eight values all have a leftmost bit in 1: this bit signals that we will be drawing a 2bpp sprite. the other three bits of the nibble behave as described above in the 1bpp case.