fixing decay code

particles/load.prtc

@@ -1,4 +1,4 @@
 s
-20000 0.5 0.33333333333 0 360 cyan 
+20000 0.5 0.33333333333 0 360 cyan 1 2
-20000 0.3555 0.783 0 360 magenta 
+20000 0.3555 0.783 0 360 magenta 1 2
-20000 0.6445 0.783 0 360 yellow 
+20000 0.6445 0.783 0 360 yellow 1 2

src/main.cpp

@@ -28,12 +28,14 @@ int main(int argc, char* argv[]) {
         if (argv[i] == "--rotate"s || argv[i] == "-r"s) {
             rotate = true;
         }
+        if (argv[i] == "--nolines"s || argv[i] == "-l"s) {
+            drawLines = false;
+        }
     }
 
     Polyparti::Room sim(screenWidth, screenHeight, fps);
 
     vector<raylib::Vector2> lines;
-    cout << "ok-1" << endl;
 
     sim.loadRoom(roomName);
     sim.loadParticles(partName);
@@ -66,19 +68,8 @@ int main(int argc, char* argv[]) {
         if (IsKeyPressed(KEY_B)) useShader = !useShader;
         if (IsKeyPressed(KEY_SPACE)) paused = !paused;
         if (IsKeyPressed(KEY_T)) sim.reverseInterval();
-        //if (IsKeyPressed(KEY_UP)) sim.adjustInterval(d_interval_pct);
-        //if (IsKeyPressed(KEY_DOWN)) sim.adjustInterval(-d_interval_pct);
-        /*if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) {
-            mouse_f = GetMousePosition();
-            mouse_f -= midpoint;
-            mouse_d = GetMouseDelta();
-            mouse_i = mouse_f - mouse_d;
-            angle = mouse_f.DotProduct(mouse_i);
-            angle = angle / mouse_f.Length() * mouse_i.Length();
-            angle = acos(angle);
-        }*/
         if (!paused) {
-            sim.updateFields();
+            sim.updateFields(window.GetTime());
             if (rotate) sim.rotateRoom(angle);
             lines.clear();
         }
@@ -129,9 +120,11 @@ int main(int argc, char* argv[]) {
             DrawTextureRec(blur.texture, {0, 0, resolution[0], -resolution[1]}, {0,0}, WHITE);
             blurShader.EndMode();
             } else {
+            if (drawLines) {
                 for (int i = 0; i < (int)lines.size() - 1; i++) {
                     lines[i].DrawLine(lines[i+1], WHITE);
                 }
+            }
 
             for (int i = 0; i < sim.getFieldCount(); i++) {
                 auto& field = sim.getField(i);

src/polypartiCL.cpp

@@ -12,7 +12,7 @@ using namespace sycl;
 
 struct Polyparti::ParticleField::ColCode {
     std::vector<XYVector> positions, velocities;
-    float t, fieldTime, lifeTime;
+    float t, fieldTime = 0, lifeTime = 0;
     int count, decay = 0;
     int color[4];
     //float decay = 1.0f;
@@ -230,7 +230,7 @@ void Polyparti::ParticleField::updateField(std::vector<XYVector> verticies) {
     colcode->moveParticles();
     colcode->fieldTime += colcode->t;
     if (colcode->dies) {
-        if (colcode->lifeTime >= colcode->fieldTime) {
+        if (colcode->fieldTime >= colcode->lifeTime) {
             colcode->color[3] -= colcode->decay;
         }
         if (colcode->color[3] <= 0) {
@@ -311,8 +311,8 @@ void Polyparti::ParticleField::setInterval(const float interval) {
 void Polyparti::ParticleField::setDecay(const float t, const float d) {
     if (t != 0) {
         colcode->dies = true;
-        colcode->lifeTime = fabs(t);
+        colcode->lifeTime = t;
-        colcode->decay = static_cast<int>(fabs(d) * 255);
+        colcode->decay = static_cast<int>(fabs(d));
     }
 }
 
@@ -421,7 +421,7 @@ void Polyparti::Room::loadParticles(std::string name) {
     else if (check == 'r') { relativeRoom = true; }
 
     if (partfile.is_open()) {
-        while (partfile >> count >> x >> y >> deg_start >> deg_end >> color) {
+        while (partfile >> count >> x >> y >> deg_start >> deg_end >> color >> life >> decay) {
             if (relativeScreen) {
                 x *= screenWidth;
                 y *= screenHeight;
@@ -435,8 +435,8 @@ void Polyparti::Room::loadParticles(std::string name) {
             newEntry.deg_start = deg_start;
             newEntry.deg_end = deg_end;
             newEntry.color = color;
-            //newEntry.life = life;
+            newEntry.life = life;
-            //newEntry.decayRate = decay;
+            newEntry.decayRate = decay;
 
             this->info.push_back(newEntry);
         }
@@ -484,7 +484,7 @@ void Polyparti::Room::rotateRoom(float degrees) {
 
 void Polyparti::Room::addFields() { for (auto& i: info) initField(i);}
 
-void Polyparti::Room::updateFields() { 
+void Polyparti::Room::updateFields(double time) { 
     for (auto& f : field) {
         f.updateField(implRoom->corners);
     }

src/polypartiCL.hpp

@@ -83,7 +83,7 @@ namespace Polyparti {
         void rotateRoom(float degrees); 
         void initField(fieldInfo info); 
         void addFields();
-        void updateFields();
+        void updateFields(double time);
         ParticleField& getField(int index);
         void adjustInterval(const float pct);
         void reverseInterval();