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Add ShadeVertsLinearUV()

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thedmd
2017-11-19 21:00:38 +01:00
parent 28a31997b7
commit 8b2d449b16
2 changed files with 26 additions and 0 deletions
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24
imgui_draw.cpp
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@ -1226,6 +1226,30 @@ void ImGui::ShadeVertsLinearAlphaGradientForLeftToRightText(ImDrawVert* vert_sta
}
}
// Distribute UV over (a, b) rectangle
void ImGui::ShadeVertsLinearUV(ImDrawVert* vert_start, ImDrawVert* vert_end, const ImVec2& a, const ImVec2& b, const ImVec2& uv_a, const ImVec2& uv_b, bool clamp)
{
const ImVec2 size = b - a;
const ImVec2 uv_size = uv_b - uv_a;
const ImVec2 scale = ImVec2(
size.x ? (uv_size.x / size.x) : 0.0f,
size.y ? (uv_size.y / size.y) : 0.0f);
if (clamp)
{
const ImVec2 min = ImMin(uv_a, uv_b);
const ImVec2 max = ImMax(uv_a, uv_b);
for (ImDrawVert* vertex = vert_start; vertex < vert_end; ++vertex)
vertex->uv = ImClamp(uv_a + ImMul(ImVec2(vertex->pos.x, vertex->pos.y) - a, scale), min, max);
}
else
{
for (ImDrawVert* vertex = vert_start; vertex < vert_end; ++vertex)
vertex->uv = uv_a + ImMul(ImVec2(vertex->pos.x, vertex->pos.y) - a, scale);
}
}
//-----------------------------------------------------------------------------
// ImFontConfig
//-----------------------------------------------------------------------------