loadsa particles

plant-eyes/plant-eyes.scm

@@ -38,15 +38,15 @@
                         (rotate (vector 0 -90 0)))
                     (else (rotate (vmul (crndvec) 20))))))
         
-        (define/public (update)
+        (define/public (update t)
             
             (for-each 
                 (lambda (child)
-                    (send child update))
+                    (send child update t))
                 child-twigs)
             
-            (when (and (< age size) (< next-ring-time (time)))
+            (when (and (< age size) (< next-ring-time t))
-                (set! next-ring-time (+ (time) speed))
+                (set! next-ring-time (+ t speed))
                 (let ((p (with-state
                                 (parent root)
                                 (hint-depth-sort) 
@@ -75,16 +75,84 @@
         
         (super-new)))
 
+(define pickup%
+    (class object%
+        (init-field 
+            (pos (vector 0 0 0)))
+        (field 
+            (col (vmul (rndvec) 0.1))
+            (root (let ((p (with-state                
+                                (translate pos)
+                                (hint-depth-sort)
+                                (blend-mode 'src-alpha 'one)
+                                (texture (load-texture "textures/particle.png"))
+                                (build-particles 20))))
+                    (with-primitive p
+                        (pdata-add "vel" "v")                  
+                        (pdata-map!
+                            (lambda (vel)
+                                (vmul (vector (crndf) (* 2 (rndf)) (crndf)) 0.02))
+                            "vel")
+                        (pdata-map!
+                            (lambda (s)
+                                (vector 2 2 2))
+                            "s")
+                        (pdata-map!
+                            (lambda (c)
+                                col)
+                            "c"))
+                    p)))
+        
+        (define/public (get-pos)
+            pos)
+        
+        (define/public (update t)
+            (with-primitive root
+                (pdata-op "+" "p" "vel")
+                (pdata-op "*" "c" 0.996)
+                (pdata-op "*" "s" 1.005)
+                (when (zero? (random 5))
+                    (let ((reset (random (pdata-size))))
+                        (pdata-set! "c" reset col)
+                        (pdata-set! "p" reset (vector 0 0 0))
+                        (pdata-set! "s" reset (vector 2 2 2))))))
+        
+        (super-new)))
 
 (define seed%
     (class object%
         (field 
             (twigs '())
+            (pickups (build-list 10 (lambda (_) 
+                        (make-object pickup% (vmul (vsub (crndvec) (vector 0 1 0)) 50)))))
+            (indicator (let ((p (with-state    
+                                (hint-depth-sort)
+                                ;(blend-mode 'src-alpha 'one )
+                                (texture (load-texture "textures/particle.png"))
+                                (build-particles 200))))
+                    (with-primitive p
+                        (pdata-add "vel" "v")
+                        (pdata-map! 
+                            (lambda (vel)
+                                (srndvec))
+                            "vel")
+                        (pdata-map! 
+                            (lambda (c)
+                                (vector 0 0 0.1))
+                            "c")
+                        
+                        (pdata-map! 
+                            (lambda (s)
+                                (let ((sz (rndf)))
+                                    (vector sz sz sz)))
+                            "s"))
+                    p))
             (debounce #t)
             (debounce-time 0)
+            (pos (vector 0 0 0))
             (root (with-state
                     (scale 5)
-                (translate (vector 0 0 0))
+                    (translate pos)
                     (texture (load-texture "textures/skin.png"))
                     (backfacecull 0)
                     (opacity 0.6)
@@ -100,22 +168,46 @@
                             (send t build (vector 0 0 0) dir) t) twigs))))
         
         
-        (define/public (update)
+        (define/public (update t)
+            
+            (let ((closest (foldl
+                            (lambda (pickup r)
+                                (if (< (vdist (send pickup get-pos) pos) 
+                                        (vdist pos r)) 
+                                    (send pickup get-pos) r))
+                            (vector 999 999 999)
+                            pickups)))
+                
+                (with-primitive indicator                    
+                    (pdata-op "+" "p" "vel")
+                    (when (< (sin (* 2 t)) 0) 
+                        (let ((reset (random (pdata-size))))
+                            (let ((pos (vmul (vnormalise (vsub closest pos)) 10)))
+                                (pdata-set! "vel" reset (vadd (vmul (srndvec) 0.01)
+                                        (vmul (vsub closest pos) (* (rndf) 0.01))))
+                                (pdata-set! "p" reset pos))))))
+            
+            (with-primitive root
+                (scale (+ 1 (* 0.001 (sin (* 2 t))))))
             
             (when (key-pressed "r") (with-primitive camera (parent 1)))
             
             (when (and debounce (key-pressed " "))
                 (add-twig (vtransform-rot (vector 0 0 1) (minverse (get-camera-transform))))         
                 (set! debounce #f)
-                (set! debounce-time (+ (time) 1)))
+                (set! debounce-time (+ t 1)))
             
-            (when (> (time) debounce-time)
+            (when (> t debounce-time)
                 (set! debounce #t)) 
             
             (for-each 
                 (lambda (twig)
-                    (send twig update))
+                    (send twig update t))
-                twigs))
+                twigs)
+            (for-each 
+                (lambda (pickup)
+                    (send pickup update t))
+                pickups))
         
         (super-new)))
 
@@ -222,4 +314,11 @@
 (fog (vector 0.2 0.5 0.3) 0.01   1 100) 
 (define s (make-object seed%))
 
-(every-frame (send s update))
+(define t 0)
+
+(define (animate)
+    (send s update t)
+    (set! t (+ t 0.02)))
+
+(every-frame (animate)) 
+