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修复只有一条线的bug

master
InkSoul 2024-01-21 23:48:01 +08:00
parent 9b753769b1
commit 8d51a6f1f3
1 changed files with 9 additions and 2 deletions
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11
tinyrender/main.cpp
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@ -26,13 +26,14 @@ void line(int x0, int y0, int x1, int y1, TGAImage& image, TGAColor color) {
{ {
if (steep) if (steep)
{ {
image.set(x, y, color); image.set(y, x, color);
} }
else else
{ {
image.set(x, y, color); image.set(x, y, color);
} }
error2 += derror2; error2 += derror2;
if (error2 > dx) // 误差值，提供从当前位置到最佳直线的距离 if (error2 > dx) // 误差值，提供从当前位置到最佳直线的距离
{ {
y += (y1 > y0 ? 1 : -1); y += (y1 > y0 ? 1 : -1);
@ -44,7 +45,13 @@ void line(int x0, int y0, int x1, int y1, TGAImage& image, TGAColor color) {
int main(int argc, char** argv) { int main(int argc, char** argv) {
TGAImage image(100, 100, TGAImage::RGB); TGAImage image(100, 100, TGAImage::RGB);
line(52, 41,90,70,image ,red); for (int i = 0; i < 1000000; i++)
{
line(13, 20, 80, 40, image, white);
line(20, 13, 40, 80, image, red);
line(80, 40, 13, 20, image, red);
}
image.flip_vertically(); // i want to have the origin at the left bottom corner of the image image.flip_vertically(); // i want to have the origin at the left bottom corner of the image
image.write_tga_file("output.tga"); image.write_tga_file("output.tga");
return 0; return 0;