ch

shared/inc/canvas/Tree.hpp

@@ -32,8 +32,9 @@ private:
   Vector2 start = {0};
   std::list<DrawArgs> drawCalls;
 
-  void drawBranch();
+  void calculateBranch();
 
+  void drawBranch(Vector2 startPoint, Vector2 endPoint, Color startColor, Color endColor, float startThickness, float endThickness);
   inline size_t getNumOfBranches(int dep);
   inline Color getStartColor(DrawArgs &arg);
   inline Color getEndColor(int dep, Color &start);

shared/src/canvas/Tree.cpp

@@ -4,6 +4,7 @@
 
 #include <raylib.h>
 #include <raymath.h>
+#include <rlgl.h>
 
 #define ITER_PER_FRAME 5000
 
@@ -40,7 +41,7 @@ void Tree::init(int size)
   start.x = size / 2;
   start.y = size;
   calculateLevels(size);
-  //texBunny = LoadTexture("dot.png"); // bug add deinit to unload texutre
+  // texBunny = LoadTexture("dot.png"); // bug add deinit to unload texutre
 }
 
 void Tree::draw(Dna *dna)
@@ -56,7 +57,7 @@ bool Tree::tick()
   size_t i = 0;
   while (!drawCalls.empty())
   {
-    drawBranch();
+    calculateBranch();
     drawCalls.pop_front();
     i++;
     if (i >= ITER_PER_FRAME)
@@ -68,7 +69,7 @@ bool Tree::tick()
 
 // Private
 
-void Tree::drawBranch()
+void Tree::calculateBranch()
 {
   DrawArgs arg = drawCalls.front();
   if (arg.dep == MAX_DEPTH)
@@ -86,17 +87,14 @@ void Tree::drawBranch()
 
   Color colorStart = getStartColor(arg);
   Color colorEnd = getEndColor(arg.dep, colorStart);
-
+  // drawBranch(arg.start, end, colorStart, colorEnd, sizeStart, sizeEnd);
   for (float i = 0; i < 1; i += fstep)
   {
     Vector2 point = Vector2Lerp(arg.start, end, i);
     Color color = ColorLerp(colorStart, colorEnd, i);
     int size = Lerp(sizeStart, sizeEnd, i);
     DrawCircleV(point, size, color);
-    //DrawTextureEx(texBunny, point,0, ((float)size) / texBunny.height, color);
-   
-    // use
-    // DrawRectangleGradientEx
+    // DrawTextureEx(texBunny, point,0, ((float)size) / texBunny.height, color);
   }
 
   // add more branches to draw
@@ -200,3 +198,51 @@ inline float Tree::getAngleVar(DrawArgs &arg)
 
   return angleVar;
 }
+
+void Tree::drawBranch(Vector2 startPoint, Vector2 endPoint, Color startColor, Color endColor, float startThickness, float endThickness)
+{
+  // Calculate the direction vector from startPoint to endPoint
+  Vector2 direction = {endPoint.x - startPoint.x, endPoint.y - startPoint.y};
+
+  // Normalize the direction vector
+  float length = sqrtf(direction.x * direction.x + direction.y * direction.y);
+  if (length == 0)
+    length = 1; // Avoid division by zero
+  Vector2 normalizedDir = {direction.x / length, direction.y / length};
+
+  // Calculate the perpendicular vector (rotate 90 degrees)
+  Vector2 perpendicular = {-normalizedDir.y, normalizedDir.x};
+
+  // Calculate the four vertices of the quadrilateral
+  Vector2 topLeft = {
+      startPoint.x + perpendicular.x * startThickness,
+      startPoint.y + perpendicular.y * startThickness};
+  Vector2 topRight = {
+      endPoint.x + perpendicular.x * endThickness,
+      endPoint.y + perpendicular.y * endThickness};
+  Vector2 bottomLeft = {
+      startPoint.x - perpendicular.x * startThickness,
+      startPoint.y - perpendicular.y * startThickness};
+  Vector2 bottomRight = {
+      endPoint.x - perpendicular.x * endThickness,
+      endPoint.y - perpendicular.y * endThickness};
+
+  // Draw the two triangles to form the quadrilateral
+  rlBegin(RL_TRIANGLES);
+  // First triangle
+  rlColor4ub(startColor.r, startColor.g, startColor.b, startColor.a);
+  rlVertex2f(topLeft.x, topLeft.y);
+  rlColor4ub(endColor.r, endColor.g, endColor.b, endColor.a);
+  rlVertex2f(topRight.x, topRight.y);
+  rlColor4ub(startColor.r, startColor.g, startColor.b, startColor.a);
+  rlVertex2f(bottomLeft.x, bottomLeft.y);
+
+  // Second triangle
+  rlColor4ub(startColor.r, startColor.g, startColor.b, startColor.a);
+  rlVertex2f(bottomLeft.x, bottomLeft.y);
+  rlColor4ub(endColor.r, endColor.g, endColor.b, endColor.a);
+  rlVertex2f(topRight.x, topRight.y);
+  rlColor4ub(endColor.r, endColor.g, endColor.b, endColor.a);
+  rlVertex2f(bottomRight.x, bottomRight.y);
+  rlEnd();
+}