Add grid lines
authorSam Moore <matches@ucc.asn.au>
Tue, 15 Apr 2014 18:34:15 +0000 (02:34 +0800)
committerSam Moore <matches@ucc.asn.au>
Tue, 15 Apr 2014 18:34:15 +0000 (02:34 +0800)
It seemed like a good idea at the time.

src/view.cpp
src/view.h

index ce7489d..2b6641a 100644 (file)
@@ -35,6 +35,31 @@ void View::ScaleAroundPoint(Real x, Real y, Real scaleAmt)
        m_bounds.h *= scaleAmt;
 }
 
+void View::DrawGrid()
+{
+       // Draw some grid lines at fixed pixel positions
+       glMatrixMode(GL_PROJECTION);
+       glLoadIdentity();
+       glOrtho(0.0, 1.0, 1.0, 0.0, -1.f, 1.f);
+       glMatrixMode(GL_MODELVIEW);
+       glLoadIdentity();
+
+       glColor4f(0.9,0.9,0.9,0.1);
+       const float num_lines = 50.0;
+       for (float i = 0; i < num_lines; ++i)
+       {
+               glBegin(GL_LINES);
+               glVertex2f(i*(1.0/num_lines), 0.0);
+               glVertex2f(i*(1.0/num_lines), 1.0);
+               glEnd();
+               glBegin(GL_LINES);
+               glVertex2f(0.0,i*(1.0/num_lines));
+               glVertex2f(1.0,i*(1.0/num_lines));
+               glEnd();
+       
+       }
+}
+
 void View::Render()
 {
        static bool debug_output_done = false;
@@ -47,12 +72,17 @@ void View::Render()
        glClearColor(1.f,1.f,1.f,1.f);
        glClear(GL_COLOR_BUFFER_BIT);
 
+       DrawGrid(); // Draw the gridlines
+
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glOrtho(Float(m_bounds.x), Float(m_bounds.x)+Float(m_bounds.w), Float(m_bounds.y) + Float(m_bounds.h), Float(m_bounds.y), -1.f, 1.f);
        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();
 
+
+
+
        glColor4f(0.f,0.f,0.f,1.f);
        glBegin(GL_QUADS);
        for (unsigned id = 0; id < m_document.ObjectCount(); ++id)
@@ -67,6 +97,7 @@ void View::Render()
        }
        glEnd();
 
+       
        for (unsigned id = 0; id < m_document.ObjectCount(); ++id)
        {
                if (m_document.m_objects.types[id] == RECT_OUTLINE)
@@ -79,4 +110,5 @@ void View::Render()
                glVertex2f(Float(obj_bounds.x), Float(obj_bounds.y) + Float(obj_bounds.h));
                glEnd();
        }
+
 }
index 6b63799..4e2306a 100644 (file)
@@ -18,6 +18,7 @@ namespace IPDF
                        void ScaleAroundPoint(Real x, Real y, Real scaleAmt);
                
                private:
+                       void DrawGrid();
                        Document & m_document;
                        Rect m_bounds;
        };

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