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圆角矩形抗锯齿

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Nanako 2024-11-16 16:38:37 +08:00
parent ffcdc3b9f5
commit 8d1bb03372
2 changed files with 6 additions and 3 deletions
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2
src/renderer/backend/dx/dx_window.cpp
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@ -89,7 +89,7 @@ void dx_window::begin_frame() {
context.draw_rectangle({ 400, 0 }, { 100, 100 }, { 0, 1, 0, 1 });
auto radius = abs(sin(get_total_time().count())) * 50;
auto angle = sin(get_total_time().count()) * 45;
context.draw_rounded_rectangle({ 500, 500 }, { 100, 400 }, { 1, 0, 0, 1 }, 10, {10, 20, 30, 40});
context.draw_rounded_rectangle({ 500, 500 }, { 100, 400 }, { 1, 0, 0, 1 }, angle, {10, 20, 30, 40});
double mouse_x, mouse_y;
glfwGetCursorPos(get_glfw_window(), &mouse_x, &mouse_y);

7
src/renderer/shader/aorii_rounded_rect.slang
View File

@ -45,7 +45,10 @@ float4 pixel_main(PSInput input) : SV_Target
int idx = (quadrant.x > 0 ? 1 : 0) + (quadrant.y > 0 ? 0 : 2);
float r = radius[idx];
float d = distance_from_rect_uv(p, r);
// TODO 抗锯齿
return input.color * -d;
float edge_width = fwidth(d);
// 根据dd计算抗锯齿
input.color.a *= smoothstep(0.0, edge_width, -d);
return input.color;
}