cgfs:draw_lines
差分
このページの2つのバージョン間の差分を表示します。
| 次のリビジョン | 前のリビジョン | ||
| cgfs:draw_lines [2024/06/11 11:12] – 作成 freemikan | cgfs:draw_lines [2025/11/19 15:11] (現在) – using std::swap; freemikan | ||
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| 行 1: | 行 1: | ||
| - | < | + | ====== DrawPixelだけで三角形を描く (1) 線を描く ====== |
| + | |||
| + | {{: | ||
| + | |||
| + | [[https:// | ||
| + | |||
| + | <file cpp> | ||
| #include < | #include < | ||
| 行 35: | 行 41: | ||
| void DrawLine(vec2 const &p0, vec2 const &p1, Color const &color) { | void DrawLine(vec2 const &p0, vec2 const &p1, Color const &color) { | ||
| + | using std::swap; | ||
| + | |||
| auto x0 = p0.x; | auto x0 = p0.x; | ||
| auto y0 = p0.y; | auto y0 = p0.y; | ||
| 行 42: | 行 50: | ||
| if (std:: | if (std:: | ||
| if (x0 > x1) { | if (x0 > x1) { | ||
| - | | + | swap(x0, x1); |
| - | | + | swap(y0, y1); |
| } | } | ||
| auto i0 = static_cast< | auto i0 = static_cast< | ||
| 行 56: | 行 64: | ||
| } else { | } else { | ||
| if (y0 > y1) { | if (y0 > y1) { | ||
| - | | + | swap(y0, y1); |
| - | | + | swap(x0, x1); |
| } | } | ||
| 行 73: | 行 81: | ||
| int main() { | int main() { | ||
| - | InitWindow(Cw, | + | InitWindow(Cw, |
| vec2 p0{0, 0}; | vec2 p0{0, 0}; | ||
| 行 86: | 行 94: | ||
| ClearBackground(RAYWHITE); | ClearBackground(RAYWHITE); | ||
| + | |||
| DrawLine(p0, | DrawLine(p0, | ||
| DrawLine(p2, | DrawLine(p2, | ||
| 行 93: | 行 102: | ||
| } | } | ||
| } | } | ||
| - | </codeprism> | + | </file> |
cgfs/draw_lines.1718071923.txt.gz · 最終更新: by freemikan