From fb23c8d47f6dcef429423256d8dddcc0f7184fc4 Mon Sep 17 00:00:00 2001
From: Samuel Fadel <samuel@nihil.ws>
Date: Sun, 4 Jun 2023 13:02:14 +0200
Subject: Further advances in nuklear port.

Rendering now looks similar to Qt version, needs a few tweaks:
* Proper multisampling
* Background

Missing features:
* Barcharts
* Interactivity (e.g. brushing/linking in all objects)
* History view of interactions
---
 scatterplot.h | 29 +++++++++++++++++++++--------
 1 file changed, 21 insertions(+), 8 deletions(-)

(limited to 'scatterplot.h')

diff --git a/scatterplot.h b/scatterplot.h
index 8286b7d..5be1647 100644
--- a/scatterplot.h
+++ b/scatterplot.h
@@ -5,12 +5,14 @@
 #include <vector>
 
 #include <armadillo>
+#include <glad/gl.h>
 #include <nod.hpp>
 
 #include "colorscale.h"
 #include "quadtree.h"
 #include "geometry.h"
 #include "scale.h"
+#include "shader.h"
 
 class Scatterplot
 {
@@ -18,15 +20,15 @@ public:
     static const int PADDING = 20;
 
     Scatterplot();
+    ~Scatterplot();
 
     arma::mat XY() const;
-    void setColorScale(std::shared_ptr<const ColorScale> colorScale);
+    void setColormap(GLuint texture);
     void setAutoScale(bool autoScale);
 
-    float x() const { return m_x; }
-    float y() const { return m_y; }
-    float width() const { return m_width; }
-    float height() const { return m_height; }
+    size_t width() const { return m_width; }
+    size_t height() const { return m_height; }
+    void setSize(size_t, size_t);
 
     float glyphSize() const { return m_glyphSize; }
     void setGlyphSize(float glyphSize);
@@ -34,6 +36,8 @@ public:
     void setDragEnabled(bool enabled) { m_dragEnabled = enabled; }
     bool isDragEnabled() const { return m_dragEnabled; }
 
+    GLuint texture() const { return m_outTex; }
+
     nod::signal<void(const arma::mat &)> xyChanged, xyInteractivelyChanged;
     nod::signal<void(const arma::vec &)> colorDataChanged, opacityDataChanged;
     nod::signal<void(const std::vector<bool> &)> selectionChanged, selectionInteractivelyChanged;
@@ -48,6 +52,7 @@ public:
     void setSelection(const std::vector<bool> &selection);
     void brushItem(int item);
     void update();
+    void draw();
 
 protected:
     // QSGNode *updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *);
@@ -64,6 +69,9 @@ private:
     // QSGNode *newGlyphTree();
 
     void applyManipulation();
+    void updateGeometry();
+    void updateMaterials();
+    void updateTransform();
     // void updateGlyphs(QSGNode *node);
     // void updateBrush(QSGNode *node);
 
@@ -73,7 +81,7 @@ private:
     arma::vec m_opacityData;
 
     // Visuals
-    float m_x, m_y, m_width, m_height;
+    size_t m_width, m_height;
     float m_glyphSize;
     std::shared_ptr<const ColorScale> m_colorScale;
 
@@ -96,9 +104,14 @@ private:
     } m_interactionState;
     bool m_dragEnabled;
 
-    Point2D m_dragOriginPos, m_dragCurrentPos;
+    std::unique_ptr<Shader> m_shader, m_shaderOutline;
+    GLuint m_VAO, m_pointsVBO, m_valuesVBO;
+    GLuint m_FBO, m_colormapTex, m_outTex;
+    GLfloat m_transform[4][4];
+    std::vector<vec2> m_points;
 
-    bool m_shouldUpdateGeometry, m_shouldUpdateMaterials;
+    vec2 m_dragOriginPos, m_dragCurrentPos;
+    bool m_redraw, m_shouldUpdateGeometry, m_shouldUpdateMaterials;
 
     std::unique_ptr<QuadTree> m_quadtree;
     void updateQuadTree();
-- 
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