ABelliqueux/nolibgs_hello_worlds
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Correct line numbers, remove ptr arithmetic

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ABelliqueux 2021-08-04 17:47:03 +02:00
parent af763ae9f9
commit 0eb3f5c49e
1 changed files with 8 additions and 8 deletions
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16
hello_tile/hello_tile.c
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@ -52,7 +52,7 @@ void display(void)
PutDrawEnv(&draw[db]); PutDrawEnv(&draw[db]);
// We're using a reverse OT, so we want to display the last item first. See PsyQ's LibRef47.pdf, p.277 // We're using a reverse OT, so we want to display the last item first. See PsyQ's LibRef47.pdf, p.277
DrawOTag(&ot[db][OTLEN - 1]); DrawOTag(&ot[db][OTLEN - 1]);
// Uncomment the following line to use a regular oredered OT. Uncomment l.100 accordingly // Comment above line, and uncomment the following line to use a regular oredered OT. Comment l.71 and Uncomment l.73 accordingly
//~ DrawOTag(ot[db]); //~ DrawOTag(ot[db]);
db = !db; db = !db;
nextpri = primbuff[db]; nextpri = primbuff[db];
@ -69,17 +69,17 @@ int main(void)
{ {
// Initialize the reversed ordering table. This means the elements at index OTLEN - 1 is drawn first. // Initialize the reversed ordering table. This means the elements at index OTLEN - 1 is drawn first.
ClearOTagR(ot[db], OTLEN); ClearOTagR(ot[db], OTLEN);
// Use regular order OT, uncomment l.77 accordingly // Use regular order OT, uncomment l.53 accordingly
//~ ClearOTag(ot[db], OTLEN); //~ ClearOTag(ot[db], OTLEN);
// yellow_tile is before pink and blue tile in the code, // yellow_tile is before pink and blue tile in the code,
// and it displays behind because it is added to a different ot index (od[db] + OTLEN - 1) // and it displays behind because it is added to a different ot index (od[db] + OTLEN - 1)
// Using a Regular or Reverse OT will have an effect on drawing order. (See lines 77 and 100) // Using a Regular or Reverse OT will have an effect on drawing order. (See lines 53 and 73)
yellow_tile = (TILE * ) nextpri; // yellow_tile is a pointer to primbuf content at adress nextpri, that's cast (type converted) to a TILE struc. yellow_tile = (TILE * ) nextpri; // yellow_tile is a pointer to primbuf content at adress nextpri, that's cast (type converted) to a TILE struc.
setTile(yellow_tile); // initialize the TILE structure ( fill the length and tag(?) value ) setTile(yellow_tile); // initialize the TILE structure ( fill the length and tag(?) value )
setXY0(yellow_tile, CENTERX - 32 , CENTERY - 48); // Set X,Y setXY0(yellow_tile, CENTERX - 32 , CENTERY - 48); // Set X,Y
setWH(yellow_tile, 128, 40); // Set Width, Height setWH(yellow_tile, 128, 40); // Set Width, Height
setRGB0(yellow_tile, 255, 255, 0); // Set color setRGB0(yellow_tile, 255, 255, 0); // Set color
addPrim(ot[db] + OTLEN - 1, yellow_tile); // Add primitive to ordering table addPrim(ot[db][OTLEN - 1], yellow_tile); // Add primitive to ordering table
nextpri += sizeof(TILE); nextpri += sizeof(TILE);
// blue_tile added at od[db] + OTLEN - 2 // blue_tile added at od[db] + OTLEN - 2
blue_tile = (TILE * ) nextpri; // blue_tile is a pointer to primbuf content at adress nextpri, that's cast (type converted) to a blue_tile struc. blue_tile = (TILE * ) nextpri; // blue_tile is a pointer to primbuf content at adress nextpri, that's cast (type converted) to a blue_tile struc.
@ -87,18 +87,18 @@ int main(void)
setXY0(blue_tile, CENTERX - 16, CENTERY - 32); // Set X,Y setXY0(blue_tile, CENTERX - 16, CENTERY - 32); // Set X,Y
setWH(blue_tile, 32, 64); // Set Width, Height setWH(blue_tile, 32, 64); // Set Width, Height
setRGB0(blue_tile, 60, 180, 255); // Set color setRGB0(blue_tile, 60, 180, 255); // Set color
addPrim(ot[db] + OTLEN - 2, blue_tile); // Add primitive to ordering table addPrim(ot[db][OTLEN - 2], blue_tile); // Add primitive to ordering table
nextpri += sizeof(TILE); // Increment the adress nextpri points to by the size of TILE struct nextpri += sizeof(TILE); // Increment the adress nextpri points to by the size of TILE struct
// pink_tile is after blue_tile in the code, // pink_tile is after blue_tile in the code,
// so it is drawn before, thus under blue_tile. // so it is drawn before, thus under blue_tile.
// However, it is added at the same ot index (od[db] + OTLEN - 2) // However, it is added at the same ot index (od[db] + OTLEN - 2)
// so using a Regular or Reverse OT won't have an effect on drawing order. // so using a Regular or Reverse OT won't have an effect on drawing order.
pink_tile = (TILE * ) nextpri; // pink_tile is a pointer to primbuf content at adress nextpri, that's cast (type converted) to a TILE struc. pink_tile = (TILE * ) nextpri; // pink_tile is a pointer to primbuf content at adress nextpri, that's cast (type converted) to a TILE struc.
setTile(pink_tile); // initialize the TILE structure ( fill the length and tag(?) value ) setTile(pink_tile); // initialize the TILE structure ( fill the length and tag(?) value )
setXY0(pink_tile, CENTERX, CENTERY - 64); // Set X,Y setXY0(pink_tile, CENTERX, CENTERY - 64); // Set X,Y
setWH(pink_tile, 64, 64); // Set Width, Height setWH(pink_tile, 64, 64); // Set Width, Height
setRGB0(pink_tile, 255, 32, 255); // Set color setRGB0(pink_tile, 255, 32, 255); // Set color
addPrim(ot[db] + OTLEN - 2, pink_tile); // Add primitive to ordering table addPrim(ot[db][OTLEN - 2], pink_tile); // Add primitive to ordering table
nextpri += sizeof(TILE); nextpri += sizeof(TILE);
FntPrint("Hello tile !"); FntPrint("Hello tile !");
FntFlush(-1); FntFlush(-1);