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fix draw line

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This commit is contained in:
Max Amundsen
2024-10-08 16:45:30 -04:00
parent dd8474ccac
commit 1b47194249
2 changed files with 12 additions and 11 deletions
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20
modules/Console_Render/draw.jai
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@@ -33,16 +33,16 @@ draw_line :: (screen: *Screen, x1: s64, y1: s64, x2: s64, y2: s64, char: PIXEL_T
draw(screen, x, y, char, color); draw(screen, x, y, char, color);
for 0..xe { for 0..xe {
x += 1; x = x + 1;
if px < 0 { if px < 0 {
px += 2 * dy1; px = px + 2 * dy1;
} else { } else {
if (dx < 0 && dy < 0) || (dx > 0 && dy > 0) then y += 1; else y -= 1; if (dx < 0 && dy < 0) || (dx > 0 && dy > 0) then y = y + 1; else y = y - 1;
px += 2 * (dy1 - dx1); px = px + 2 * (dy1 - dx1);
draw(screen, x, y, char, color);
} }
draw(screen, x, y, char, color);
} }
} else { } else {
if dy >= 0 { if dy >= 0 {
@@ -58,13 +58,13 @@ draw_line :: (screen: *Screen, x1: s64, y1: s64, x2: s64, y2: s64, char: PIXEL_T
draw(screen, x, y, char, color); draw(screen, x, y, char, color);
for 0..ye { for 0..ye {
y += 1; y = y + 1;
if py <= 0 { if py <= 0 {
py += 2 * dx1; py = py + 2 * dx1;
} else { } else {
if (dx < 0 && dy < 0 ) || (dx > 0 && dy > 0) then x += 1; else x -= 1; if (dx < 0 && dy < 0 ) || (dx > 0 && dy > 0) then x = x + 1; else x = x - 1;
py += 2 * (dx1 - dy1); py = py + 2 * (dx1 - dy1);
} }
draw(screen, x, y, char, color); draw(screen, x, y, char, color);

3
src/main.jai
View File

@@ -3,7 +3,8 @@ main :: () {
screen := New(Screen); screen := New(Screen);
init_screen(screen, 5, 2); init_screen(screen, 5, 2);
draw_line(screen, 0, 0, 0, 0); draw_line(screen, 0, 0, 2, 0);
draw(screen, 3, 0, color = .FG_GREEN);
print("%\n", screen.buffer); print("%\n", screen.buffer);
} }