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--- notes:comporg:spring2024:projects:def0 [2024/02/14 23:16] – [Loops] cburling
+++ notes:comporg:spring2024:projects:def0 [2024/02/15 04:58] (current) – [Drawing Regions] rspringe
@@ Line 45: / Line 45: @@
 =====Drawing Regions=====
+Before a region can be drawn, its borders have to be defined within the texture file.
+This is done similarly to the define_region functions in C:
+<code C>
+define_region(minX, minY, maxX, maxY, hotspotX, hotspotY);
+</code>
+Except that here, you have to input each coordinate value individually, including the hotspots.
+Getting only the necessary lines from the compiled code, defining a region would look like so:
+<code asm>
+out GPU_RegionMinX, R?
+out GPU_RegionMinY, R?
+. . .
+out GPU_RegionHotSpotY, R?
+</code>
+Where "R?" refers to the register that stores that specific coordinate.
 To display your regions you have to say where you want to display the region. That is done by putting in values for X and Y into 2 different registers. Here is what that looks like:
@@ Line 83: / Line 102: @@
    "ieq" -> "integer equal to"
    "ige" -> "integer greater than or equal to"
+    mov R0, 13
+    ilt R0, 14 ; would set the value in R0 to 0 as the result of the comparison is true.
 *One needs to keep in mind that when these comparisons are passed, they are replaced with a resulting value, like 1 or 0. So do be careful when comparing a register to an integer or another register.
@@ Line 95: / Line 118: @@
 jmp __label
 </code>
-where your label would be somethin akin to '_main_loop'
+where your label would be somethin akin to ''_main_loop''
-You'd also need a label such like '_end_main_loop' which would hold your 'hlt' command
+You'd also need a label such like ''_end_main_loop'' which would hold your ''hlt'' command
 =====TASK=====

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