44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
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#include <genesis.h>
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int main()
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{
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//Initialise the bitmap engine
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BMP_init(TRUE, BG_A, PAL0, FALSE);
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//Set the colour of the line. We are using pallete 0 for the bitmap, so we have 0->15. 15 is used for white text, so we set an unused pallet colour, 14 to blue - RGB 0000FF.
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u16 colour_blue = RGB24_TO_VDPCOLOR(0x0000ff);
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VDP_setPaletteColor(14, colour_blue);
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//VDP_setBackgroundColor(14);
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//A line needs a source coordinate x,y and a destination coordinate x,y along with a pallete colour.
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Line l;
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l.pt1.x = 0;
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l.pt1.y = 0;
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l.pt2.x = 255;
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l.pt2.y = 0;
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l.col = 0x0000ff;
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l.col |= l.col << 4; // if we do not left shift the colour, we get gaps in the line
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while(TRUE)
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{
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//Clear the bitmap
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BMP_clear();
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//Draw the line defined above (in the background, hidden)
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BMP_drawLine(&l);
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//Flip the data to the screen - i.e. actually draw the complete image on screen
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BMP_flip(1);
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//Increment the destination y coordinate
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l.pt2.y = l.pt2.y + 2;
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//Reset the destination y coordinate if it hits 160
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if (l.pt2.y == 160)
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{
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l.pt2.y = 0;
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}
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}
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return 0;
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}
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