separate point cloud and energy draw buffers

zoneb/bin/data/shaders/bound.frag

@@ -4,6 +4,7 @@ precision mediump float;
 
 uniform sampler2DRect   u_depth;
 uniform sampler2DRect   u_ofcam;
+uniform sampler2DRect   u_energy;
 uniform sampler2DRect   u_v4l2cam;
 uniform sampler2DRect   u_buffer0;
 uniform sampler2DRect   u_buffer1;
@@ -185,7 +186,10 @@ void main() {
   }
   else {
     vec4 pointCloudColor = texture(u_ofcam, st); 
-    gl_FragColor = vec4(mix(vec3(0), pointCloudColor.rgb, pointCloudColor.a), 1.0);
+    vec4 energyColor = texture(u_energy, st);
+    vec4 color = vec4(mix(vec3(0), pointCloudColor.rgb, pointCloudColor.a), 1.0);
+    gl_FragColor = vec4(mix(pointCloudColor.rgb, energyColor.rgb, energyColor.a), 1.0);
+    // gl_FragColor = vec4(mix(vec3(0), energyColor.rgb, energyColor.a), 1.0);
   }
 
 #endif

zoneb/bin/data/shaders/particles/draw.frag

@@ -19,6 +19,7 @@ uniform vec3 uHottest1;
 uniform vec3 uHottest3d0;
 uniform vec3 uHottest3d1;
 uniform vec3 uBetween;
+uniform int uEnergy;
 
 in vec2 texCoordVarying;
 in vec3 gPos;
@@ -114,7 +115,14 @@ void main()
   float rate = 1-smoothstep(D - d, D + d, length(gPos.x + uBetween.x) + n);
   rate *= uAreThereTwoPeopleTween;
   vec3 remapedColor = mix(remapedColorC, remapedColorW, rate);
-  float alpha = max(0, 1 - pow(gAge,4)) * 0.1;
+  float alpha = max(0, 1 - pow(gAge,4));
+  if(uEnergy > 0) {
+    // alpha = 1;
+    alpha *= 0.3;
+  }
+  else {
+    alpha *= 0.1;
+  }
 
 //   if(vTemperature < 0.5) {
 //     alpha *= vTemperature * 2;

zoneb/bin/data/shaders/particles/draw.geom

@@ -8,6 +8,8 @@ uniform mat4 projectionMatrix;
 
 uniform float u_time;
 
+uniform int uEnergy;
+
 // App specific uniforms and attributes.
 // uniform float uSpriteSize;
 
@@ -42,8 +44,16 @@ void main()
   if(gAge >= 1) return;
   for (int i = 0; i < gl_in.length(); ++i)
   {
-    vec3 vOffset = (vPrevPosition[i].xyz - vPosition[i].xyz) * (gAge * 5);
+    vec3 vOffset;
-    vOffset += normalize(vOffset) * 5;
+    if(uEnergy > 0) {
+      vOffset = (vPrevPosition[i].xyz - vPosition[i].xyz) * (gAge * 15);
+      // vOffset += normalize(vOffset) * 5;
+    }
+    else {
+      vOffset = (vPrevPosition[i].xyz - vPosition[i].xyz);
+      vOffset += normalize(vOffset) * 2;
+      vOffset = vec3(1,0,0);
+    }
     // if(length(vOffset) < 4) {
     //   vOffset = normalize(vOffset) * 4;
     // }
@@ -56,14 +66,14 @@ void main()
       gl_Position = projectionMatrix * (shiftPos + vec4(0.0, 0.0, 0.0, 0.0) * uSpriteSize);
       EmitVertex();
 
-      if(gAge > 0 && gTarget.w > 0) {
+      // if(gAge > 0 && gTarget.w > 0) {
-        for(int j = 0; j < 3; j++) {
+      //   for(int j = 0; j < 2; j++) {
-          gl_Position = projectionMatrix * (vPosition[i] + vec4(0.0, float(j+1), 0.0, 0.0) * uSpriteSize);
+      //     gl_Position = projectionMatrix * (vPosition[i] + vec4(0.0, float(j+1), 0.0, 0.0) * uSpriteSize);
-          EmitVertex();
+      //     EmitVertex();
-          gl_Position = projectionMatrix * (shiftPos + vec4(0.0, float(j+1), 0.0, 0.0) * uSpriteSize);
+      //     gl_Position = projectionMatrix * (shiftPos + vec4(0.0, float(j+1), 0.0, 0.0) * uSpriteSize);
-          EmitVertex();
+      //     EmitVertex();
-        }
+      //   }
-      }
+      // }
     }
 
 

zoneb/bin/data/shaders/particles/update.frag

@@ -169,7 +169,7 @@ void main()
   }
 
   if(vValid == 1 && target.w > 0 && length(target.xy - pos.xy) < 100) { // arrived
-    age += 1;
+    age += 0.01;
   }
 
   // wandering
@@ -216,7 +216,7 @@ void main()
   if(target.w > 0) { // go to target
     float th = atan(-pos.y + target.y, -pos.x + target.x);
     float phi = atan(-pos.z + target.z, length(target.xy-pos.xy));
-    th += 3.1415 / 1 * simplex3d_fractal(vec3(pos.xyz * 0.01));
+    th += 3.1415 / 1 * simplex3d_fractal(vec3(pos.xyz * 0.01) + vec3(u_time, 0, 0));
     phi += 3.1415 / 1 * simplex3d_fractal(pos.xyz * 0.01);
     force.x = cos(th) * cos(phi);
     force.y = sin(th) * cos(phi);

zoneb/src/ofApp.cpp

@@ -160,6 +160,8 @@ void ofApp::setup()
 
   fbos.insert({"ofcam", ofFbo()});
   fbos.at("ofcam").allocate(ofGetWidth(), ofGetHeight(), GL_RGBA32F_ARB);
+  fbos.insert({"energy", ofFbo()});
+  fbos.at("energy").allocate(ofGetWidth(), ofGetHeight(), GL_RGBA32F_ARB);
 
   for (auto s : gradientNames)
   {
@@ -327,6 +329,7 @@ void ofApp::onParticlesDraw(ofxShader &shader)
   shader.setUniform3f("uHottest3d1", hotspot3d1);
   shader.setUniform3f("uBetween", uBetween);
   shader.setUniform1f("uAreThereTwoPeopleTween", areThereTwoPeopleTween);
+  shader.setUniform1i("uEnergy", uEnergy);
 }
 
 void ofApp::drawMain()
@@ -335,6 +338,7 @@ void ofApp::drawMain()
   auto tex = kinectDevice.getDepthTex();
   boundShader.setUniformTexture("u_depth", tex);
   boundShader.setUniformTexture("u_ofcam", fbos.at("ofcam"));
+  boundShader.setUniformTexture("u_energy", fbos.at("energy"));
   boundShader.setUniformTexture("u_v4l2cam", v4l2Buffer.at(v4l2BufferCount));
   boundShader.setUniform1i("u_calib", calibMode == true ? 1 : 0);
   boundShader.setUniform2f("u_calibXY", registrationXY);
@@ -360,6 +364,27 @@ void ofApp::draw()
     particles.whateverImages.at("u_world") = kinectDevice.getDepthToWorldTex();
     particles.whateverImages.at("u_v4l2cam") = v4l2Buffer.at(v4l2BufferCount);
 
+    fbos.at("energy").begin();
+    ofClear(0);
+    cam.begin();
+    if (blendAdd)
+    {
+      ofEnableBlendMode(OF_BLENDMODE_ADD);
+      ofDisableDepthTest();
+    }
+    else
+    {
+      ofEnableDepthTest();
+    }
+    uEnergy = 1;
+    particles.draw();
+    if (blendAdd)
+    {
+      ofDisableBlendMode();
+    }
+    cam.end();
+    fbos.at("energy").end();
+
     fbos.at("ofcam").begin();
     ofClear(0);
     cam.begin();
@@ -372,6 +397,7 @@ void ofApp::draw()
     {
       ofEnableDepthTest();
     }
+    uEnergy = 0;
     particles.draw();
     if (blendAdd)
     {

zoneb/src/ofApp.h

@@ -60,6 +60,7 @@ private:
   ofPixels v4l2Pixels;
 
   ofxGpuParticles particles;
+  int uEnergy;
 
   std::vector<std::vector<ofVec3f>> hotspots;
   ofVec3f hotspot0, hotspot1;