diff options
Diffstat (limited to 'src/gfx.cpp')
| -rw-r--r-- | src/gfx.cpp | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/gfx.cpp b/src/gfx.cpp index 8a1b9741c..411267525 100644 --- a/src/gfx.cpp +++ b/src/gfx.cpp @@ -139,6 +139,50 @@ void GfxDrawLine(int x, int y, int x2, int y2, int color) blitter->DrawLine(dpi->dst_ptr, x, y, x2, y2, dpi->width, dpi->height, color); } +/** + * Draws the projection of a parallelepiped. + * This can be used to draw boxes in world coordinates. + * + * @param x Screen X-coordinate of top front corner. + * @param y Screen Y-coordinate of top front corner. + * @param dx1 Screen X-length of first edge. + * @param dy1 Screen Y-length of first edge. + * @param dx2 Screen X-length of second edge. + * @param dy2 Screen Y-length of second edge. + * @param dx3 Screen X-length of third edge. + * @param dy3 Screen Y-length of third edge. + */ +void DrawBox(int x, int y, int dx1, int dy1, int dx2, int dy2, int dx3, int dy3) +{ + /* .... + * .. .... + * .. .... + * .. ^ + * <--__(dx1,dy1) /(dx2,dy2) + * : --__ / : + * : --__ / : + * : *(x,y) : + * : | : + * : | .. + * .... |(dx3,dy3) + * .... | .. + * ....V. + */ + + static const byte color = 255; + + GfxDrawLine(x, y, x + dx1, y + dy1, color); + GfxDrawLine(x, y, x + dx2, y + dy2, color); + GfxDrawLine(x, y, x + dx3, y + dy3, color); + + GfxDrawLine(x + dx1, y + dy1, x + dx1 + dx2, y + dy1 + dy2, color); + GfxDrawLine(x + dx1, y + dy1, x + dx1 + dx3, y + dy1 + dy3, color); + GfxDrawLine(x + dx2, y + dy2, x + dx2 + dx1, y + dy2 + dy1, color); + GfxDrawLine(x + dx2, y + dy2, x + dx2 + dx3, y + dy2 + dy3, color); + GfxDrawLine(x + dx3, y + dy3, x + dx3 + dx1, y + dy3 + dy1, color); + GfxDrawLine(x + dx3, y + dy3, x + dx3 + dx2, y + dy3 + dy2, color); +} + /** Truncate a given string to a maximum width if neccessary. * If the string is truncated, add three dots ('...') to show this. |