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Metrics: Show wire-frame mesh and approximate surface area when hovering ImDrawCmd. Amend aeb5795.

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Internals: Added ImTriangleArea()
This commit is contained in:
omar
2019-11-25 12:01:04 +01:00
parent aeb57952d6
commit bbe0409942
4 changed files with 49 additions and 70 deletions
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97
imgui.cpp
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@ -45,7 +45,7 @@ CODE
// [SECTION] FORWARD DECLARATIONS
// [SECTION] CONTEXT AND MEMORY ALLOCATORS
// [SECTION] MAIN USER FACING STRUCTURES (ImGuiStyle, ImGuiIO)
// [SECTION] MISC HELPERS/UTILITIES (Maths, String, Format, Hash, File functions)
// [SECTION] MISC HELPERS/UTILITIES (Geomtry, String, Format, Hash, File functions)
// [SECTION] MISC HELPERS/UTILITIES (File functions)
// [SECTION] MISC HELPERS/UTILITIES (ImText* functions)
// [SECTION] MISC HELPERS/UTILITIES (Color functions)
@ -1083,7 +1083,7 @@ void ImGuiIO::ClearInputCharacters()
}
//-----------------------------------------------------------------------------
// [SECTION] MISC HELPERS/UTILITIES (Maths, String, Format, Hash, File functions)
// [SECTION] MISC HELPERS/UTILITIES (Geometry, String, Format, Hash, File functions)
//-----------------------------------------------------------------------------
ImVec2 ImLineClosestPoint(const ImVec2& a, const ImVec2& b, const ImVec2& p)
@ -9715,7 +9715,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
static bool show_windows_rects = false;
static int show_windows_rect_type = WRT_WorkRect;
static bool show_windows_begin_order = false;
static bool show_drawcmd_clip_rects = true;
static bool show_drawcmd_details = true;
// Basic info
ImGuiContext& g = *GImGui;
@ -9766,7 +9766,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
return;
if (window && !window->WasActive)
ImGui::Text("(Note: owning Window is inactive: DrawList is not being rendered!)");
ImGui::TextDisabled("Warning: owning Window is inactive. This DrawList is not being rendered!");
unsigned int elem_offset = 0;
for (const ImDrawCmd* pcmd = draw_list->CmdBuffer.begin(); pcmd < draw_list->CmdBuffer.end(); elem_offset += pcmd->ElemCount, pcmd++)
@ -9780,73 +9780,51 @@ void ImGui::ShowMetricsWindow(bool* p_open)
}
ImDrawIdx* idx_buffer = (draw_list->IdxBuffer.Size > 0) ? draw_list->IdxBuffer.Data : NULL;
// Calculate approximate coverage area (touched pixel count)
// This will be in pixels squared as long there's no post-scaling happening to the ImGui output
// Optionally also draw all the polys in the list in wireframe when hovering over
float total_area = 0.0f;
for (unsigned int base_idx = elem_offset; base_idx < (elem_offset + pcmd->ElemCount); base_idx += 3)
{
ImVec2 triangles_pos[3];
for (int n = 0; n < 3; n++)
{
int vtx_i = idx_buffer ? idx_buffer[base_idx + n] : (base_idx + n);
ImDrawVert& v = draw_list->VtxBuffer[vtx_i];
triangles_pos[n] = v.pos;
}
// Calculate triangle area and accumulate
float area = abs((triangles_pos[0].x * (triangles_pos[1].y - triangles_pos[2].y)) +
(triangles_pos[1].x * (triangles_pos[2].y - triangles_pos[0].y)) +
(triangles_pos[2].x * (triangles_pos[0].y - triangles_pos[1].y))) * 0.5f;
total_area += area;
}
char buf[300];
ImFormatString(buf, IM_ARRAYSIZE(buf), "Draw %4d triangles, tex 0x%p, area %.0fpx^2, clip_rect (%4.0f,%4.0f)-(%4.0f,%4.0f)",
pcmd->ElemCount/3, (void*)(intptr_t)pcmd->TextureId, total_area,
ImFormatString(buf, IM_ARRAYSIZE(buf), "DrawCmd: %4d triangles, Tex 0x%p, ClipRect (%4.0f,%4.0f)-(%4.0f,%4.0f)",
pcmd->ElemCount/3, (void*)(intptr_t)pcmd->TextureId,
pcmd->ClipRect.x, pcmd->ClipRect.y, pcmd->ClipRect.z, pcmd->ClipRect.w);
bool pcmd_node_open = ImGui::TreeNode((void*)(pcmd - draw_list->CmdBuffer.begin()), "%s", buf);
if (show_drawcmd_clip_rects && fg_draw_list && ImGui::IsItemHovered())
if (show_drawcmd_details && fg_draw_list && ImGui::IsItemHovered())
{
ImRect clip_rect = pcmd->ClipRect;
ImRect vtxs_rect;
for (unsigned int i = elem_offset; i < elem_offset + (int)pcmd->ElemCount; i++)
vtxs_rect.Add(draw_list->VtxBuffer[idx_buffer ? idx_buffer[i] : i].pos);
clip_rect.Floor(); fg_draw_list->AddRect(clip_rect.Min, clip_rect.Max, IM_COL32(255,0,255,255));
vtxs_rect.Floor(); fg_draw_list->AddRect(vtxs_rect.Min, vtxs_rect.Max, IM_COL32(255,255,0,255));
fg_draw_list->AddRect(ImFloor(clip_rect.Min), ImFloor(clip_rect.Max), IM_COL32(255,0,255,255));
fg_draw_list->AddRect(ImFloor(vtxs_rect.Min), ImFloor(vtxs_rect.Max), IM_COL32(255,255,0,255));
}
if (!pcmd_node_open)
continue;
// Display vertex information summary. Hover to get all triangles drawn in wireframe
ImFormatString(buf, IM_ARRAYSIZE(buf), "ElemCount: %d, ElemCount/3: %d, VtxOffset: +%d, IdxOffset: +%d", pcmd->ElemCount, pcmd->ElemCount/3, pcmd->VtxOffset, pcmd->IdxOffset);
ImGui::Selectable(buf, false);
if (fg_draw_list && ImGui::IsItemHovered())
// Calculate approximate coverage area (touched pixel count)
// This will be in pixels squared as long there's no post-scaling happening to the renderer output.
float total_area = 0.0f;
for (unsigned int base_idx = elem_offset; base_idx < (elem_offset + pcmd->ElemCount); base_idx += 3)
{
// Draw wireframe version of everything
ImVec2 triangle[3];
for (int n = 0; n < 3; n++)
triangle[n] = draw_list->VtxBuffer[idx_buffer ? idx_buffer[base_idx + n] : (base_idx + n)].pos;
total_area += ImTriangleArea(triangle[0], triangle[1], triangle[2]);
}
// Display vertex information summary. Hover to get all triangles drawn in wire-frame
ImFormatString(buf, IM_ARRAYSIZE(buf), "Mesh: ElemCount: %d, VtxOffset: +%d, IdxOffset: +%d, Area: ~%0.f px", pcmd->ElemCount, pcmd->VtxOffset, pcmd->IdxOffset, total_area);
ImGui::Selectable(buf);
if (fg_draw_list && ImGui::IsItemHovered() && show_drawcmd_details)
{
// Draw wire-frame version of everything
ImDrawListFlags backup_flags = fg_draw_list->Flags;
fg_draw_list->Flags &= ~ImDrawListFlags_AntiAliasedLines; // Disable AA on triangle outlines at is more readable for very large and thin triangles.
fg_draw_list->Flags &= ~ImDrawListFlags_AntiAliasedLines; // Disable AA on triangle outlines is more readable for very large and thin triangles.
ImRect clip_rect = pcmd->ClipRect;
fg_draw_list->AddRect(ImFloor(clip_rect.Min), ImFloor(clip_rect.Max), IM_COL32(255, 0, 255, 255));
for (unsigned int base_idx = elem_offset; base_idx < (elem_offset + pcmd->ElemCount); base_idx += 3)
{
ImVec2 triangles_pos[3];
ImVec2 triangle[3];
for (int n = 0; n < 3; n++)
{
int vtx_i = idx_buffer ? idx_buffer[base_idx + n] : (base_idx + n);
ImDrawVert& v = draw_list->VtxBuffer[vtx_i];
triangles_pos[n] = v.pos;
}
fg_draw_list->AddPolyline(triangles_pos, 3, IM_COL32(255, 255, 0, 255), true, 1.0f);
triangle[n] = draw_list->VtxBuffer[idx_buffer ? idx_buffer[base_idx + n] : (base_idx + n)].pos;
fg_draw_list->AddPolyline(triangle, 3, IM_COL32(255, 255, 0, 255), true, 1.0f);
}
fg_draw_list->Flags = backup_flags;
}
@ -9856,22 +9834,21 @@ void ImGui::ShowMetricsWindow(bool* p_open)
for (int prim = clipper.DisplayStart, idx_i = elem_offset + clipper.DisplayStart*3; prim < clipper.DisplayEnd; prim++)
{
char *buf_p = buf, *buf_end = buf + IM_ARRAYSIZE(buf);
ImVec2 triangles_pos[3];
ImVec2 triangle[3];
for (int n = 0; n < 3; n++, idx_i++)
{
int vtx_i = idx_buffer ? idx_buffer[idx_i] : idx_i;
ImDrawVert& v = draw_list->VtxBuffer[vtx_i];
triangles_pos[n] = v.pos;
ImDrawVert& v = draw_list->VtxBuffer[idx_buffer ? idx_buffer[idx_i] : idx_i];
triangle[n] = v.pos;
buf_p += ImFormatString(buf_p, buf_end - buf_p, "%s %04d: pos (%8.2f,%8.2f), uv (%.6f,%.6f), col %08X\n",
(n == 0) ? "elem" : " ", idx_i, v.pos.x, v.pos.y, v.uv.x, v.uv.y, v.col);
(n == 0) ? "Vert:" : " ", idx_i, v.pos.x, v.pos.y, v.uv.x, v.uv.y, v.col);
}
ImGui::Selectable(buf, false);
if (fg_draw_list && ImGui::IsItemHovered())
{
ImDrawListFlags backup_flags = fg_draw_list->Flags;
fg_draw_list->Flags &= ~ImDrawListFlags_AntiAliasedLines; // Disable AA on triangle outlines at is more readable for very large and thin triangles.
fg_draw_list->AddPolyline(triangles_pos, 3, IM_COL32(255,255,0,255), true, 1.0f);
fg_draw_list->Flags &= ~ImDrawListFlags_AntiAliasedLines; // Disable AA on triangle outlines is more readable for very large and thin triangles.
fg_draw_list->AddPolyline(triangle, 3, IM_COL32(255,255,0,255), true, 1.0f);
fg_draw_list->Flags = backup_flags;
}
}
@ -10058,7 +10035,7 @@ void ImGui::ShowMetricsWindow(bool* p_open)
}
ImGui::Unindent();
}
ImGui::Checkbox("Show clipping rectangle when hovering ImDrawCmd node", &show_drawcmd_clip_rects);
ImGui::Checkbox("Show details when hovering ImDrawCmd node", &show_drawcmd_details);
ImGui::TreePop();
}