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finish refactoring implot for v0.5
This commit is contained in:
epezent
parent
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d9ae47bf2b
17
README.md
17
README.md
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@ -40,7 +40,7 @@ ImPlot is an immediate mode plotting widget for [Dear ImGui](https://github.com/
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## Usage
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The API is used just like any other ImGui `BeginX`/`EndX` pair. First, start a plotting context with `ImPlot::BeginPlot()`. Next, plot as many items as you want with the provided `PlotX` functions (e.g. `PlotLine()`, `PlotBars()`, `PlotErrorBars()`, etc). Finally, wrap things up with a call to `ImPlot::EndPlot()`. That's it!
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The API is used just like any other ImGui `BeginX`/`EndX` pair. First, start a new plot with `ImPlot::BeginPlot()`. Next, plot as many items as you want with the provided `PlotX` functions (e.g. `PlotLine()`, `PlotBars()`, `PlotErrorBars()`, etc). Finally, wrap things up with a call to `ImPlot::EndPlot()`. That's it!
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```cpp
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if (ImPlot::BeginPlot("My Plot")) {
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@ -55,11 +55,22 @@ Consult `implot_demo.cpp` for a comprehensive example of ImPlot's features.
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## Integration
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Just add `implot.h`, `implot.cpp`, and optionally `implot_demo.cpp` to your sources. This assumes you already have an ImGui-ready environment. If not, consider trying [mahi-gui](https://github.com/mahilab/mahi-gui), which bundles ImGui, ImPlot, and several other packages for you.
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1) Add `implot.h`, `implot_internal.h`, `implot.cpp`, `implot_items.cpp` and optionally `implot_demo.cpp` to your sources.
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2) Create and destroy an `ImPlotContext` wherever you create your `ImGuiContext`:
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```cpp
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ImGui::CreateContext();
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ImPlot::CreateContext();
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...
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ImPlot::DestroyContext();
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ImGui::DestroyContext();
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```
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Of course, this assumes you already have an ImGui-ready environment. If not, consider trying [mahi-gui](https://github.com/mahilab/mahi-gui), which bundles ImGui, ImPlot, and several other packages for you.
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## Special Notes
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- If you experience data truncation and/or visual glitches, it is **HIGHLY** recommended that you either:
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- If you experience data truncation and/or visual glitches, it is **HIGHLY** recommended that you EITHER:
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1) Handle the `ImGuiBackendFlags_RendererHasVtxOffset` flag in your renderer when using 16-bit indices (the official OpenGL3 renderer supports this) and use an ImGui version with patch [imgui@f6120f8](https://github.com/ocornut/imgui/commit/f6120f8e16eefcdb37b63974e6915a3dd35414be).
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2) Enable 32-bit indices by uncommenting `#define ImDrawIdx unsigned int` in your `imconfig.h` file.
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- By default, no anti-aliasing is done on line plots for performance reasons. If you use 4x MSAA, then you likely won't even notice. However, you can re-enable AA with the `ImPlotFlags_AntiAliased` flag.
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2498
implot.cpp
2498
implot.cpp
File diff suppressed because it is too large
Load Diff
24
implot.h
24
implot.h
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@ -25,12 +25,14 @@
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#pragma once
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#include "imgui.h"
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#define IMPLOT_VERSION "0.5 WIP"
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//-----------------------------------------------------------------------------
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// Forward declarations and basic types
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// Forward Declarations and Basic Types
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//-----------------------------------------------------------------------------
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// Forward declarations
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struct ImPlotContext; // ImPlot context (opaque struct)
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struct ImPlotContext; // ImPlot context (opaque struct, see implot_internal.h)
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// Enums/Flags
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typedef int ImPlotFlags; // -> enum ImPlotFlags_
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@ -137,7 +139,7 @@ enum ImPlotColormap_ {
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struct ImPlotPoint {
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double x, y;
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ImPlotPoint() { x = y = 0.0; }
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ImPlotPoint(double _x, double _y) { x = _x; y = _y; }
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ImPlotPoint(double _x, double _y) { x = _x; y = _y; }
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double operator[] (size_t idx) const { return (&x)[idx]; }
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double& operator[] (size_t idx) { return (&x)[idx]; }
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#ifdef IMPLOT_POINT_CLASS_EXTRA
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@ -149,16 +151,15 @@ struct ImPlotPoint {
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struct ImPlotRange {
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double Min, Max;
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ImPlotRange();
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bool Contains(double value) const;
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double Size() const;
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bool Contains(double value) const { return value >= Min && value <= Max; };
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double Size() const { return Max - Min; };
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};
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// Combination of two ranges for X and Y axes.
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struct ImPlotLimits {
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ImPlotRange X, Y;
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ImPlotLimits();
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bool Contains(const ImPlotPoint& p) const;
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bool Contains(double x, double y) const;
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bool Contains(const ImPlotPoint& p) const { return Contains(p.x, p.y); }
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bool Contains(double x, double y) const { return X.Contains(x) && Y.Contains(y); }
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};
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// Plot style structure
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@ -193,9 +194,8 @@ struct ImPlotInputMap {
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ImPlotInputMap();
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};
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//-----------------------------------------------------------------------------
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// ImPlot end-user API
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// ImPlot End-User API
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//-----------------------------------------------------------------------------
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namespace ImPlot {
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@ -385,6 +385,7 @@ void SetNextPlotLimitsY(double y_min, double y_max, ImGuiCond cond = ImGuiCond_O
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// Set the X axis ticks and optionally the labels for the next plot.
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void SetNextPlotTicksX(const double* values, int n_ticks, const char** labels = NULL, bool show_default = false);
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void SetNextPlotTicksX(double x_min, double x_max, int n_ticks, const char** labels = NULL, bool show_default = false);
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// Set the Y axis ticks and optionally the labels for the next plot.
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void SetNextPlotTicksY(const double* values, int n_ticks, const char** labels = NULL, bool show_default = false, int y_axis = 0);
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void SetNextPlotTicksY(double y_min, double y_max, int n_ticks, const char** labels = NULL, bool show_default = false, int y_axis = 0);
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@ -399,8 +400,11 @@ ImVec2 GetPlotSize();
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// Convert pixels to a position in the current plot's coordinate system. A negative y_axis uses the current value of SetPlotYAxis (0 initially).
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ImPlotPoint PixelsToPlot(const ImVec2& pix, int y_axis = -1);
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ImPlotPoint PixelsToPlot(float x, float y, int y_axis = -1);
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// Convert a position in the current plot's coordinate system to pixels. A negative y_axis uses the current value of SetPlotYAxis (0 initially).
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ImVec2 PlotToPixels(const ImPlotPoint& plt, int y_axis = -1);
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ImVec2 PlotToPixels(double x, double y, int y_axis = -1);
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// Renders a vertical color scale using the current color map
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void ShowColormapScale(double scale_min, double scale_max, float height);
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@ -0,0 +1,447 @@
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// MIT License
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// Copyright (c) 2020 Evan Pezent
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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// ImPlot v0.5 WIP
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// You may use this file to debug, understand or extend ImPlot features but we don't provide any guarantee of forward compatibility!
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//-----------------------------------------------------------------------------
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// [SECTION] Header mess
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//-----------------------------------------------------------------------------
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#pragma once
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#ifndef IMGUI_DEFINE_MATH_OPERATORS
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#define IMGUI_DEFINE_MATH_OPERATORS
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#endif
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#include "imgui_internal.h"
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#ifndef IMPLOT_VERSION
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#error Must include implot.h before implot_internal.h
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#endif
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//-----------------------------------------------------------------------------
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// [SECTION] Forward declarations
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//-----------------------------------------------------------------------------
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struct ImPlotTick;
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struct ImPlotAxis;
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struct ImPlotAxisState;
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struct ImPlotAxisColor;
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struct ImPlotItem;
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struct ImPlotState;
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struct ImPlotNextPlotData;
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//-----------------------------------------------------------------------------
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// [SECTION] Context pointer
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//-----------------------------------------------------------------------------
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extern ImPlotContext* GImPlot; // Current implicit context pointer
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//-----------------------------------------------------------------------------
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// [SECTION] Macros
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//-----------------------------------------------------------------------------
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// The maximum number of supported y-axes (DO NOT CHANGE THIS)
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#define MAX_Y_AXES 3
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//-----------------------------------------------------------------------------
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// [SECTION] Generic helpers
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//-----------------------------------------------------------------------------
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// Computes the common (base-10) logarithm
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static inline float ImLog10(float x) { return log10f(x); }
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static inline double ImLog10(double x) { return log10(x); }
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// Returns true if a flag is set
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template <typename TSet, typename TFlag>
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inline bool ImHasFlag(TSet set, TFlag flag) { return (set & flag) == flag; }
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// Flips a flag in a flagset
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template <typename TSet, typename TFlag>
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inline void ImFlipFlag(TSet& set, TFlag flag) { ImHasFlag(set, flag) ? set &= ~flag : set |= flag; }
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// Linearly remaps x from [x0 x1] to [y0 y1].
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template <typename T>
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inline T ImRemap(T x, T x0, T x1, T y0, T y1) { return y0 + (x - x0) * (y1 - y0) / (x1 - x0); }
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// Returns always positive modulo (r != 0)
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inline int ImPosMod(int l, int r) { return (l % r + r) % r; }
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// Offset calculator helper
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template <int Count>
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struct ImOffsetCalculator {
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ImOffsetCalculator(int* sizes) {
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Offsets[0] = 0;
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for (int i = 1; i < Count; ++i)
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Offsets[i] = Offsets[i-1] + sizes[i-1];
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}
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int Offsets[Count];
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};
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// Character buffer writer helper
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struct ImBufferWriter
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{
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char* const Buffer;
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size_t Pos;
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const size_t Size;
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ImBufferWriter(char* buffer, size_t size) : Buffer(buffer), Pos(0), Size(size) {}
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void Write(const char* fmt, ...) IM_FMTARGS(2) {
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va_list argp;
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va_start(argp, fmt);
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const int written = ::vsnprintf(&Buffer[Pos], Size - Pos - 1, fmt, argp);
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if (written > 0)
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Pos += ImMin(size_t(written), Size-Pos-1);
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va_end(argp);
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}
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};
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//-----------------------------------------------------------------------------
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// [SECTION] ImPlot Structs
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//-----------------------------------------------------------------------------
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// Tick mark info
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struct ImPlotTick
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{
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double PlotPos;
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float PixelPos;
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ImVec2 Size;
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int TextOffset;
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bool Major;
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bool RenderLabel;
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bool Labeled;
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ImPlotTick(double value, bool major, bool render_label = true) {
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PlotPos = value;
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Major = major;
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RenderLabel = render_label;
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Labeled = false;
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}
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};
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// Axis state information that must persist after EndPlot
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struct ImPlotAxis
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{
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bool Dragging;
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bool Hovered;
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ImPlotRange Range;
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ImPlotAxisFlags Flags, PreviousFlags;
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ImPlotAxis() {
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Dragging = false;
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Hovered = false;
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Range.Min = 0;
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Range.Max = 1;
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Flags = PreviousFlags = ImPlotAxisFlags_Default;
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}
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};
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// Axis state information only needed between BeginPlot/EndPlot
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struct ImPlotAxisState
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{
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ImPlotAxis* Axis;
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bool HasRange;
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ImGuiCond RangeCond;
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bool Present;
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int PresentSoFar;
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bool Invert;
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bool LockMin;
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bool LockMax;
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bool Lock;
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ImPlotAxisState(ImPlotAxis& axis, bool has_range, ImGuiCond range_cond, bool present, int previous_present) :
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Axis(&axis),
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HasRange(has_range),
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RangeCond(range_cond),
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Present(present),
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PresentSoFar(previous_present + (Present ? 1 : 0)),
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Invert(ImHasFlag(Axis->Flags, ImPlotAxisFlags_Invert)),
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LockMin(ImHasFlag(Axis->Flags, ImPlotAxisFlags_LockMin) || (HasRange && RangeCond == ImGuiCond_Always)),
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LockMax(ImHasFlag(Axis->Flags, ImPlotAxisFlags_LockMax) || (HasRange && RangeCond == ImGuiCond_Always)),
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Lock(!Present || ((LockMin && LockMax) || (HasRange && RangeCond == ImGuiCond_Always)))
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{}
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ImPlotAxisState() :
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Axis(), HasRange(), RangeCond(), Present(), PresentSoFar(),Invert(),LockMin(), LockMax(), Lock()
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{}
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};
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struct ImPlotAxisColor
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{
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ImU32 Major, Minor, Txt;
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ImPlotAxisColor() { Major = Minor = Txt = 0; }
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};
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// State information for Plot items
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struct ImPlotItem
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{
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bool Show;
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bool SeenThisFrame;
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bool Highlight;
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ImVec4 Color;
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int NameOffset;
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ImGuiID ID;
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ImPlotItem() {
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Show = true;
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SeenThisFrame = false;
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Highlight = false;
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Color = ImPlot::NextColormapColor();
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NameOffset = -1;
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ID = 0;
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}
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~ImPlotItem() { ID = 0; }
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};
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// Holds Plot state information that must persist after EndPlot
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struct ImPlotState
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{
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ImPool<ImPlotItem> Items;
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ImRect BB_Legend;
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ImVec2 SelectStart;
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bool Selecting;
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bool Querying;
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bool Queried;
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bool DraggingQuery;
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ImVec2 QueryStart;
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ImRect QueryRect;
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ImPlotAxis XAxis;
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ImPlotAxis YAxis[MAX_Y_AXES];
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ImPlotFlags Flags, PreviousFlags;
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int ColorIdx;
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int CurrentYAxis;
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ImPlotState() {
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Selecting = Querying = Queried = DraggingQuery = false;
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SelectStart = QueryStart = ImVec2(0,0);
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Flags = PreviousFlags = ImPlotFlags_Default;
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ColorIdx = 0;
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CurrentYAxis = 0;
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}
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};
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// Temporary data storage for upcoming plot
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struct ImPlotNextPlotData
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{
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ImGuiCond XRangeCond;
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ImGuiCond YRangeCond[MAX_Y_AXES];
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ImPlotRange X;
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ImPlotRange Y[MAX_Y_AXES];
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bool HasXRange;
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bool HasYRange[MAX_Y_AXES];
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bool ShowDefaultTicksX;
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bool ShowDefaultTicksY[MAX_Y_AXES];
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ImPlotNextPlotData() {
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HasXRange = false;
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ShowDefaultTicksX = true;
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for (int i = 0; i < MAX_Y_AXES; ++i) {
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HasYRange[i] = false;
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ShowDefaultTicksY[i] = true;
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}
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}
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};
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// Holds state information that must persist between calls to BeginPlot()/EndPlot()
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struct ImPlotContext {
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// Plot States
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ImPool<ImPlotState> Plots;
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ImPlotState* CurrentPlot;
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// Legend
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ImVector<int> LegendIndices;
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ImGuiTextBuffer LegendLabels;
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// Bounding Boxes
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ImRect BB_Frame;
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ImRect BB_Canvas;
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ImRect BB_Plot;
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// Cached Colors
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ImU32 Col_Frame;
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ImU32 Col_Bg;
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ImU32 Col_Border;
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ImU32 Col_Txt;
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ImU32 Col_TxtDis;
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ImU32 Col_SlctBg;
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ImU32 Col_SlctBd;
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ImU32 Col_QryBg;
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ImU32 Col_QryBd;
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// Axis States
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ImPlotAxisColor Col_X;
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ImPlotAxisColor Col_Y[MAX_Y_AXES];
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ImPlotAxisState X;
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ImPlotAxisState Y[MAX_Y_AXES];
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// Tick Marks and Labels
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ImVector<ImPlotTick> XTicks;
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ImVector<ImPlotTick> YTicks[MAX_Y_AXES];
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ImGuiTextBuffer XTickLabels;
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ImGuiTextBuffer YTickLabels[MAX_Y_AXES];
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float AxisLabelReference[MAX_Y_AXES];
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// Transformations and Data Extents
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ImRect PixelRange[MAX_Y_AXES];
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double Mx;
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double My[MAX_Y_AXES];
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double LogDenX;
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double LogDenY[MAX_Y_AXES];
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ImPlotRange ExtentsX;
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ImPlotRange ExtentsY[MAX_Y_AXES];
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// Data Fitting Flags
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bool FitThisFrame;
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bool FitX;
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bool FitY[MAX_Y_AXES];
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// Hover states
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bool Hov_Frame;
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bool Hov_Plot;
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// Axis Rendering Flags
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bool RenderX;
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bool RenderY[MAX_Y_AXES];
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// Axis Locking Flags
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bool LockPlot;
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bool ChildWindowMade;
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// Style and Colormaps
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ImPlotStyle Style;
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ImVector<ImGuiColorMod> ColorModifiers;
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ImVector<ImGuiStyleMod> StyleModifiers;
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ImVec4* Colormap;
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int ColormapSize;
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// Misc
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int VisibleItemCount;
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int DigitalPlotItemCnt;
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int DigitalPlotOffset;
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ImPlotNextPlotData NextPlotData;
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||||
ImPlotInputMap InputMap;
|
||||
ImPlotPoint LastMousePos[MAX_Y_AXES];
|
||||
};
|
||||
|
||||
struct ImPlotAxisScale {
|
||||
ImPlotAxisScale(int y_axis, float tx, float ty, float zoom_rate) {
|
||||
ImPlotContext& gp = *GImPlot;
|
||||
Min = ImPlot::PixelsToPlot(gp.BB_Plot.Min - gp.BB_Plot.GetSize() * ImVec2(tx * zoom_rate, ty * zoom_rate), y_axis);
|
||||
Max = ImPlot::PixelsToPlot(gp.BB_Plot.Max + gp.BB_Plot.GetSize() * ImVec2((1 - tx) * zoom_rate, (1 - ty) * zoom_rate), y_axis);
|
||||
}
|
||||
ImPlotPoint Min, Max;
|
||||
};
|
||||
|
||||
//-----------------------------------------------------------------------------
|
||||
// [SECTION] Internal API
|
||||
// No guarantee of forward compatibility here!
|
||||
//-----------------------------------------------------------------------------
|
||||
|
||||
namespace ImPlot {
|
||||
|
||||
// Initializes an ImPlotContext
|
||||
void Initialize(ImPlotContext* ctx);
|
||||
// Resets an ImPlot context for the next call to BeginPlot
|
||||
void Reset(ImPlotContext* ctx);
|
||||
// Gets a plot from the current ImPlotContext
|
||||
ImPlotState* GetPlot(const char* title);
|
||||
// Gets the current plot from the current ImPlotContext
|
||||
ImPlotState* GetCurrentPlot();
|
||||
// Updates pixel space to plot space transformation variables for the current plot
|
||||
void UpdateTransformCache();
|
||||
// Extends the current plots axes so that it encompasses point p
|
||||
void FitPoint(const ImPlotPoint& p);
|
||||
// Register or get an existing item from the current plot
|
||||
ImPlotItem* RegisterItem(const char* label_id);
|
||||
// Get the ith plot item from the current plot
|
||||
ImPlotItem* GetItem(int i);
|
||||
// Get a plot item from the current plot
|
||||
ImPlotItem* GetItem(const char* label_id);
|
||||
// Gets a plot item from a specific plot
|
||||
ImPlotItem* GetItem(const char* plot_title, const char* item_label_id);
|
||||
// Returns the number of entries in the current legend
|
||||
int GetLegendCount();
|
||||
// Gets the ith entry string for the current legend
|
||||
const char* GetLegendLabel(int i);
|
||||
// Populates a list of ImPlotTicks with automatically spaced ticks
|
||||
void AddDefaultTicks(const ImPlotRange& range, int nMajor, int nMinor, bool logscale, ImVector<ImPlotTick> &out);
|
||||
// Populates a list of ImPlotTicks with custom spaced and labeled ticks
|
||||
void AddCustomTicks(const double* values, const char** labels, int n, ImVector<ImPlotTick>& ticks, ImGuiTextBuffer& buffer);
|
||||
// Creates label information for a list of ImPlotTick
|
||||
void LabelTicks(ImVector<ImPlotTick> &ticks, bool scientific, ImGuiTextBuffer& buffer);
|
||||
// Calculates the maximum width of a list of ImPlotTick
|
||||
float MaxTickLabelWidth(ImVector<ImPlotTick>& ticks);
|
||||
// Updates axis ticks, lins, and label colors
|
||||
void UpdateAxisColor(int axis_flag, ImPlotAxisColor* col);
|
||||
// Sets the colormap for a particular ImPlotContext
|
||||
void SetColormapEx(ImPlotColormap colormap, int samples, ImPlotContext* ctx);
|
||||
void SetColormapEx(const ImVec4* colors, int num_colors, ImPlotContext* ctx);
|
||||
// Draws vertical text. The position is the bottom left of the text rect.
|
||||
void AddTextVertical(ImDrawList *DrawList, const char *text, ImVec2 pos, ImU32 text_color);
|
||||
// Calculates the size of vertical text
|
||||
ImVec2 CalcTextSizeVertical(const char *text);
|
||||
// Returns white or black text given background color
|
||||
inline ImU32 CalcTextColor(const ImVec4& bg) { return (bg.x * 0.299 + bg.y * 0.587 + bg.z * 0.114) > 0.729 ? IM_COL32_BLACK : IM_COL32_WHITE; }
|
||||
// Rounds x to powers of 2,5 and 10 for generating axis labels
|
||||
// Taken from Graphics Gems 1 Chapter 11.2, "Nice Numbers for Graph Labels"
|
||||
double NiceNum(double x, bool round);
|
||||
// Turns NANs to 0s
|
||||
inline double ConstrainNan(double val) { return isnan(val) ? 0 : val; }
|
||||
// Turns infinity to floating point maximums
|
||||
inline double ConstrainInf(double val) { return val == HUGE_VAL ? DBL_MAX : val == -HUGE_VAL ? - DBL_MAX : val; }
|
||||
// Turns numbers less than or equal to 0 to 0.001 (sort of arbitrary, is there a better way?)
|
||||
inline double ConstrainLog(double val) { return val <= 0 ? 0.001f : val; }
|
||||
// Returns true if val is NAN or INFINITY
|
||||
inline bool NanOrInf(double val) { return val == HUGE_VAL || val == -HUGE_VAL || isnan(val); }
|
||||
// Computes order of magnitude of double.
|
||||
inline int OrderOfMagnitude(double val) { return val == 0 ? 0 : (int)(floor(log10(fabs(val)))); }
|
||||
// Returns the precision required for a order of magnitude.
|
||||
inline int OrderToPrecision(int order) { return order > 0 ? 0 : 1 - order; }
|
||||
// Returns a floating point precision to use given a value
|
||||
inline int Precision(double val) { return OrderToPrecision(OrderOfMagnitude(val)); }
|
||||
// Returns the intersection point of two lines A and B (assumes they are not parallel!)
|
||||
inline ImVec2 Intersection(const ImVec2& a1, const ImVec2& a2, const ImVec2& b1, const ImVec2& b2) {
|
||||
float v1 = (a1.x * a2.y - a1.y * a2.x);
|
||||
float v2 = (b1.x * b2.y - b1.y * b2.x);
|
||||
float v3 = ((a1.x - a2.x) * (b1.y - b2.y) - (a1.y - a2.y) * (b1.x - b2.x));
|
||||
return ImVec2((v1 * (b1.x - b2.x) - v2 * (a1.x - a2.x)) / v3, (v1 * (b1.y - b2.y) - v2 * (a1.y - a2.y)) / v3);
|
||||
}
|
||||
// Fills a buffer with n samples linear interpolated from vmin to vmax
|
||||
template <typename T>
|
||||
void FillRange(ImVector<T>& buffer, int n, T vmin, T vmax) {
|
||||
buffer.resize(n);
|
||||
T step = (vmax - vmin) / (n - 1);
|
||||
for (int i = 0; i < n; ++i) {
|
||||
buffer[i] = vmin + i * step;
|
||||
}
|
||||
}
|
||||
// Offsets and strides a data buffer
|
||||
template <typename T>
|
||||
inline T OffsetAndStride(const T* data, int idx, int count, int offset, int stride) {
|
||||
idx = ImPosMod(offset + idx, count);
|
||||
return *(const T*)(const void*)((const unsigned char*)data + (size_t)idx * stride);
|
||||
}
|
||||
|
||||
} // namespace ImPlot
|
||||
1442
implot_items.cpp
Normal file
1442
implot_items.cpp
Normal file
File diff suppressed because it is too large
Load Diff
Loading…
Reference in New Issue
Block a user