diff --git a/source/engine/2dphysics.c b/source/engine/2dphysics.c
index 151eb40..9b04785 100644
--- a/source/engine/2dphysics.c
+++ b/source/engine/2dphysics.c
@@ -13,7 +13,6 @@
 
 #include "log.h"
 
-cpBody *ballBody = NULL;
 cpSpace *space = NULL;
 float phys2d_gravity = -50.f;
 
@@ -42,6 +41,8 @@ void phys2d_shape_apply(struct phys2d_shape *shape)
 void init_phys2dshape(struct phys2d_shape *shape, struct gameobject *go)
 {
     shape->go = go;
+    cpShapeSetCollisionType(shape->shape, go);
+    YughInfo("Added shape type %d", go);
     phys2d_shape_apply(shape);
 }
 
@@ -140,9 +141,7 @@ struct phys2d_box *Make2DBox(struct gameobject *go)
 
 void phys2d_boxinit(struct phys2d_box *box, struct gameobject *go)
 {
-    box->shape.shape =
-	cpSpaceAddShape(space,
-			cpBoxShapeNew(go->body, box->w, box->h, box->r));
+    box->shape.shape = cpSpaceAddShape(space, cpBoxShapeNew(go->body, box->w, box->h, box->r));
     init_phys2dshape(&box->shape, go);
     phys2d_applybox(box);
 }
@@ -179,9 +178,7 @@ void phys2d_polyinit(struct phys2d_poly *poly, struct gameobject *go)
 {
     cpTransform T = { 0 };
     poly->shape.shape =
-	cpSpaceAddShape(space,
-			cpPolyShapeNew(go->body, 0, NULL, T,
-				       poly->radius));
+	cpSpaceAddShape(space, cpPolyShapeNew(go->body, 0, NULL, T, poly->radius));
     init_phys2dshape(&poly->shape, go);
     phys2d_applypoly(poly);
 }
@@ -231,14 +228,10 @@ struct phys2d_edge *Make2DEdge(struct gameobject *go)
 void phys2d_edgeinit(struct phys2d_edge *edge, struct gameobject *go)
 {
     edge->shapes[0] =
-	cpSpaceAddShape(space,
-			cpSegmentShapeNew(go->body, cpvzero, cpvzero,
-					  edge->thickness));
+	cpSpaceAddShape(space, cpSegmentShapeNew(go->body, cpvzero, cpvzero, edge->thickness));
     edge->shape.go = go;
     phys2d_edgeshapeapply(&edge->shape, edge->shapes[0]);
 
-
-
     phys2d_applyedge(edge);
 }
 
@@ -283,11 +276,8 @@ void edge_gui(struct phys2d_edge *edge)
 {
     if (nk_button_label(ctx, "Add Edge Vertex")) phys2d_edgeaddvert(edge);
 
-    for (int i = 0; i < edge->n; i++) {
-	//ImGui::PushID(i);
+    for (int i = 0; i < edge->n; i++)
 	nk_property_float2(ctx, "E", 0.f, &edge->points[i*2], 1.f, 0.01f, 0.01f);
-	//ImGui::PopID();
-    }
 
     nk_property_float(ctx, "Thickness", 0.01f, &edge->thickness, 1.f, 0.01f, 0.01f);
 
@@ -304,9 +294,7 @@ void phys2d_applycircle(struct phys2d_circle *circle)
 
     cpCircleShapeSetRadius(circle->shape.shape, radius);
     cpCircleShapeSetOffset(circle->shape.shape, offset);
-    cpBodySetMoment(circle->shape.go->body,
-		    cpMomentForCircle(circle->shape.go->mass, 0, radius,
-				      offset));
+    cpBodySetMoment(circle->shape.go->body, cpMomentForCircle(circle->shape.go->mass, 0, radius, offset));
 }
 
 void phys2d_applyseg(struct phys2d_segment *seg)
@@ -461,18 +449,67 @@ void phys2d_dbgdrawedge(struct phys2d_edge *edge)
     }
 }
 
-s7_pointer *cbs;
-
-static cpBool s7_phys_cb(cpArbiter *arb, cpSpace *space, void *data) {
-    s7_pointer *cb = data;
-    script_call_sym(*cb);
+void phys2d_reindex_body(cpBody *body) {
+    cpSpaceReindexShapesForBody(space, body);
 }
 
-void phys2d_add_begin_handler(s7_pointer cb) {
-    arrput(cbs, cb);
-    cpCollisionHandler *handler = cpSpaceAddDefaultCollisionHandler(space);
-    handler->userData = &arrlast(cbs);
-    handler->beginFunc = s7_phys_cb;
 
-    YughInfo("Added a phys collider CB.");
+static cpBool s7_phys_cb_begin(cpArbiter *arb, cpSpace *space, void *data) {
+    struct gameobject *go = data;
+    script_call_sym(go->cbs->begin);
+
+    YughInfo("Gameobject %p began collision.", data);
+
+    cpBody *body1;
+    cpBody *body2;
+    cpArbiterGetBodies(arb, &body1, &body2);
+
+    cpShape *shape1;
+    cpShape *shape2;
+    cpArbiterGetShapes(arb, &shape1, &shape2);
+
+    YughInfo("Body %p began collision with body %p.", body1, body2);
+    YughInfo("Shape %p began collision with shape %p.", shape1, shape2);
+    return 1;
+}
+
+static cpBool s7_phys_cb_presolve(cpArbiter *arb, cpSpace *space, void *data) {
+
+}
+
+static void s7_phys_cb_postsolve(cpArbiter *arb, cpSpace *space, void *data) {
+
+}
+
+static void s7_phys_cb_separate(cpArbiter *Arb, cpSpace *space, void *data) {
+    struct gameobject *go = data;
+    script_call_sym(go->cbs->separate);
+}
+
+void phys2d_add_handler_type(int cmd, struct gameobject *go, s7_pointer cb) {
+    cpCollisionHandler *handler = cpSpaceAddWildcardHandler(space, go);
+
+    if (!go->cbs)
+        go->cbs = malloc(sizeof(*go->cbs));
+
+    handler->userData = go;
+    YughInfo("Making phys handler %d for type %d", cmd, go);
+
+    switch (cmd) {
+        case 0:
+            handler->beginFunc = s7_phys_cb_begin;
+            go->cbs->begin = cb;
+            break;
+
+        case 1:
+            break;
+
+        case 2:
+            break;
+
+        case 3:
+            handler->separateFunc = s7_phys_cb_separate;
+            go->cbs->separate = cb;
+            break;
+    }
 }
\ No newline at end of file
diff --git a/source/engine/2dphysics.h b/source/engine/2dphysics.h
index ce331b7..e1db0c3 100644
--- a/source/engine/2dphysics.h
+++ b/source/engine/2dphysics.h
@@ -11,6 +11,11 @@ extern float phys2d_gravity;
 extern int physOn;
 extern cpSpace *space;
 
+struct phys_cbs {
+    s7_pointer begin;
+    s7_pointer separate;
+};
+
 struct phys2d_shape {
     cpShape *shape;
     struct gameobject *go;
@@ -95,8 +100,10 @@ void phys2d_init();
 void phys2d_update(float deltaT);
 void phys2d_apply();
 
-void phys2d_add_begin_handler(s7_pointer cb);
+void phys2d_add_handler_type(int cmd, struct gameobject *go,  s7_pointer cb);
 
 void shape_gui(struct phys2d_shape *shape);
 
+void phys2d_reindex_body(cpBody *body);
+
 #endif
diff --git a/source/engine/debug/debugdraw.c b/source/engine/debug/debugdraw.c
index 8bd7825..e62071a 100644
--- a/source/engine/debug/debugdraw.c
+++ b/source/engine/debug/debugdraw.c
@@ -3,6 +3,7 @@
 #include "openglrender.h"
 
 #include "shader.h"
+#include "log.h"
 
 static uint32_t circleVBO;
 static uint32_t circleVAO;
@@ -68,10 +69,10 @@ void draw_circle(int x, int y, float radius, int pixels)
     shader_use(circleShader);
 
     float verts[] = {
-	x - radius, y - radius,
-	x + radius, y - radius,
-	x - radius, y + radius,
-	x + radius, y + radius,
+	x - radius, y - radius, -1, -1,
+	x + radius, y - radius, 1, -1,
+	x - radius, y + radius, -1, 1,
+	x + radius, y + radius, 1, 1
     };
 
     glBindBuffer(GL_ARRAY_BUFFER, circleVBO);
@@ -82,7 +83,7 @@ void draw_circle(int x, int y, float radius, int pixels)
 
     glBindVertexArray(circleVAO);
     glEnableVertexAttribArray(0);
-    glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, NULL);
+    glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, NULL);
     glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 }
 
diff --git a/source/engine/gameobject.c b/source/engine/gameobject.c
index d0d2d04..36b4686 100644
--- a/source/engine/gameobject.c
+++ b/source/engine/gameobject.c
@@ -57,7 +57,8 @@ struct gameobject *MakeGameobject()
 
     gameobject_setpickcolor(&go);
     strncpy(go.editor.mname, "New object", MAXNAME);
-    go.body =  cpSpaceAddBody(space, cpBodyNew(go.mass, 1.f));
+    go.body = cpSpaceAddBody(space, cpBodyNew(go.mass, 1.f));
+
 
     arrput(gameobjects, go);
 
@@ -151,13 +152,6 @@ void gameobject_init(struct gameobject *go, FILE * fprefab)
     int n;
 
     for (int i = 0; i < comp_n; i++) {
-    /*
-        fread(&n, sizeof(int), 1, fprefab);
-        go->components[i] = components[n];
-        struct component *newc = &go->components[i];
-        newc->go = go;
-        newc->data = calloc(1, newc->datasize);
-    */
         fread(&n, sizeof(int), 1, fprefab);
         arrput(go->components, components[n]);
         struct component *newc = &arrlast(go->components);
@@ -217,18 +211,14 @@ void toggleprefab(struct gameobject *go)
     }
 }
 
-void gameobject_update(struct gameobject *go)
-{
-    if (go->script)
-	script_run(go->script);
-}
-
 void gameobject_move(struct gameobject *go, float xs, float ys)
 {
     cpVect p = cpBodyGetPosition(go->body);
     p.x += xs * deltaT;
     p.y += ys * deltaT;
     cpBodySetPosition(go->body, p);
+
+    phys2d_reindex_body(go->body);
 }
 
 void gameobject_rotate(struct gameobject *go, float as)
@@ -236,10 +226,14 @@ void gameobject_rotate(struct gameobject *go, float as)
     cpFloat a = cpBodyGetAngle(go->body);
     a += as * deltaT;
     cpBodySetAngle(go->body, a);
+
+        phys2d_reindex_body(go->body);
 }
 
 void gameobject_setangle(struct gameobject *go, float angle) {
     cpBodySetAngle(go->body, angle);
+
+        phys2d_reindex_body(go->body);
 }
 
 void gameobject_setpos(struct gameobject *go, float x, float y) {
@@ -248,14 +242,10 @@ void gameobject_setpos(struct gameobject *go, float x, float y) {
     p.x = x;
     p.y = y;
     cpBodySetPosition(go->body, p);
-}
 
-void update_gameobjects() {
-    for (int i = 0; i < arrlen(gameobjects); i++)
-        gameobject_update(&gameobjects[i]);
+    phys2d_reindex_body(go->body);
 }
 
-
 void object_gui(struct gameobject *go)
 {
     float temp_pos[2];
@@ -323,3 +313,13 @@ void object_gui(struct gameobject *go)
 	gameobject_delcomponent(go, n);
 
 }
+
+void gameobject_draw_debugs() {
+    for (int i = 0; i < arrlen(gameobjects); i++) {
+        for (int j = 0; j < arrlen(gameobjects[i].components); j++) {
+            struct component *c = &gameobjects[i].components[j];
+
+            if (c->draw_debug) c->draw_debug(c->data);
+        }
+    }
+}
\ No newline at end of file
diff --git a/source/engine/gameobject.h b/source/engine/gameobject.h
index 56568d6..375410f 100644
--- a/source/engine/gameobject.h
+++ b/source/engine/gameobject.h
@@ -7,6 +7,7 @@
 #include "config.h"
 #include <stdbool.h>
 #include <chipmunk/chipmunk.h>
+#include "2dphysics.h"
 
 struct shader;
 struct sprite;
@@ -23,6 +24,10 @@ struct editor {
     char rootPrefabName[MAXNAME];
 };
 
+struct go_temp {
+    struct phys_cbs phys_cbs;
+};
+
 struct gameobject {
     struct mTransform transform;
     struct editor editor;
@@ -33,7 +38,7 @@ struct gameobject {
     float f;			/* friction */
     float e;			/* elasticity */
     struct component *components;
-    char *script;
+    struct phys_cbs *cbs;
 };
 
 extern struct gameobject *gameobjects;
@@ -62,14 +67,13 @@ void gameobject_revertprefab(struct gameobject *go);
 
 void gameobject_init(struct gameobject *go, FILE * fprefab);
 
-void gameobject_update(struct gameobject *go);
-void update_gameobjects();
-
 void gameobject_move(struct gameobject *go, float xs, float ys);
 void gameobject_rotate(struct gameobject *go, float as);
 void gameobject_setangle(struct gameobject *go, float angle);
 void gameobject_setpos(struct gameobject *go, float x, float y);
 
+void gameobject_draw_debugs();
+
 void object_gui(struct gameobject *go);
 
 #endif
diff --git a/source/engine/input.c b/source/engine/input.c
index 1cba45e..75f1bbb 100644
--- a/source/engine/input.c
+++ b/source/engine/input.c
@@ -87,6 +87,7 @@ void win_key_callback(GLFWwindow *w, int key, int scancode, int action, int mods
         char keybuf[10];
         if (key > 289 && key < 302) {
             sprintf(keybuf, "f%d", key-289);
+            strcat(keystr, keybuf);
         } else {
             switch(key) {
                 case GLFW_KEY_ENTER:
diff --git a/source/engine/mrbffi.c b/source/engine/mrbffi.c
index 87fb483..a8f7dfd 100644
--- a/source/engine/mrbffi.c
+++ b/source/engine/mrbffi.c
@@ -11,6 +11,7 @@
 #include "log.h"
 #include "input.h"
 #include "gameobject.h"
+#include "openglrender.h"
 
 #include "s7.h"
 
@@ -69,7 +70,7 @@ s7_pointer s7_gui_text(s7_scheme *sc, s7_pointer args) {
 s7_pointer s7_settings_cmd(s7_scheme *sc, s7_pointer args) {
     int cmd = s7_integer(s7_car(args));
     double val = s7_real(s7_cadr(args));
-    YughInfo("Changing a setting.");
+
     switch(cmd) {
         case 0: // render fps
             renderMS = val;
@@ -82,6 +83,10 @@ s7_pointer s7_settings_cmd(s7_scheme *sc, s7_pointer args) {
         case 2:
             physMS = val;
             break;
+
+        case 3:
+            debug_draw_phys(val);
+            break;
     }
 
     return args;
@@ -277,14 +282,13 @@ s7_pointer s7_set_body_pos(s7_scheme *sc, s7_pointer args) {
 }
 
 s7_pointer s7_phys_cmd(s7_scheme *sc, s7_pointer args) {
-    int cmd = s7_integer(s7_car(args));
-    s7_pointer env = s7_cadr(args);
+    int go = s7_integer(s7_car(args));
+    int cmd = s7_integer(s7_cadr(args));
+    s7_pointer env = s7_caddr(args);
 
-    switch(cmd) {
-        case 0:
-            phys2d_add_begin_handler(env);
-            break;
-    }
+    if (go == -1) return;
+
+    phys2d_add_handler_type(cmd, get_gameobject_from_id(go), env);
 }
 
 #define S7_FUNC(NAME, ARGS) s7_define_function(s7, #NAME, s7_ ##NAME, ARGS, 0, 0, "")
@@ -309,6 +313,6 @@ void ffi_load() {
     S7_FUNC(set_pawn, 1);
     S7_FUNC(set_body, 3);
     S7_FUNC(set_body_pos, 4);
-    S7_FUNC(phys_cmd, 2);
+    S7_FUNC(phys_cmd, 3);
 }
 
diff --git a/source/engine/openglrender.c b/source/engine/openglrender.c
index 4a128e3..f866467 100644
--- a/source/engine/openglrender.c
+++ b/source/engine/openglrender.c
@@ -62,6 +62,10 @@ struct sprite *tsprite = NULL;
 
 static unsigned int projUBO;
 
+void debug_draw_phys(int draw) {
+    debugDrawPhysics = draw;
+}
+
 void openglInit()
 {
     if (!mainwin) {
@@ -129,6 +133,10 @@ void openglRender(struct window *window)
     //script_call_sym(window->gui_cb);
     call_gui();
 
+    //// DEBUG
+    if (debugDrawPhysics)
+        gameobject_draw_debugs();
+
     ///// Sprites
     glDepthFunc(GL_LESS);
     shader_use(spriteShader);
diff --git a/source/engine/openglrender.h b/source/engine/openglrender.h
index 2a613bb..41ea6ad 100644
--- a/source/engine/openglrender.h
+++ b/source/engine/openglrender.h
@@ -42,7 +42,8 @@ void openglRender(struct window *window);
 void openglInit3d(struct window *window);
 void openglRender3d(struct window *window, struct mCamera *camera);
 
-void BindUniformBlock(GLuint shaderID, const char *bufferName,
-		      GLuint bufferBind);
+void debug_draw_phys(int draw);
+
+void BindUniformBlock(GLuint shaderID, const char *bufferName, GLuint bufferBind);
 
 #endif
diff --git a/source/scripts/engine.scm b/source/scripts/engine.scm
index 29f134c..26545f8 100644
--- a/source/scripts/engine.scm
+++ b/source/scripts/engine.scm
@@ -90,8 +90,29 @@
 (define (body_pos! body x y) (set_body_pos body 0 x y))
 (define (body_move! body x y) (set_body_pos body 1 x y))
 
-(define-macro (collide . expr)
+(define (b2i val) (if (eq? val #f) 0 1))
+(define (dbg_draw_phys val) (settings_cmd 3 (b2i val)))
+
+(define-macro (register-phys type body . expr)
     (let ((f (gensym)))
         `(begin
 	    (define (,f) (begin . ,expr))
-	    (phys_cmd 0 ,f))))
+	    (phys_cmd ,body ,(case type
+	                  ((collide) 0)
+			  ((separate) 3)) ,f))))
+
+(define (collide . expr)
+    (register-phys collide body expr))
+
+(define-macro (separate . expr)
+    `(register-phys separate body ,@expr))
+
+(define-macro (not! var)
+    `(set! ,var (not ,var)))
+
+(define-macro* (define-script name (lets ()) . expr )
+    `(define* (,name (gameobject -1))
+        (let ((body gameobject)
+	     ,@lets)
+	  ,@expr
+	  (curlet))))
diff --git a/source/shaders/circlefrag.glsl b/source/shaders/circlefrag.glsl
index 39d38bb..8067611 100644
--- a/source/shaders/circlefrag.glsl
+++ b/source/shaders/circlefrag.glsl
@@ -8,12 +8,14 @@ uniform int thickness;
 
 void main()
 {
+
     // int tt = thickness + 1;
     float R1 = 1.f;
     float R2 = 1.f - (thickness / radius);
     float dist = sqrt(dot(coords, coords));
     if (dist <= R2 || dist >= R1)
         discard;
+
 /*
     float smoother = 0.01f -  (radius  * 0.00003f);
     float sm = smoothstep(R1, R1-smoother, dist);
diff --git a/source/shaders/circlevert.glsl b/source/shaders/circlevert.glsl
index c530cd6..e98286a 100644
--- a/source/shaders/circlevert.glsl
+++ b/source/shaders/circlevert.glsl
@@ -1,5 +1,5 @@
 #version 330 core
-layout (location = 0) in vec2 vertex;
+layout (location = 0) in vec4 vertex;
 out vec2 coords;
 
 layout (std140) uniform Projection
@@ -10,4 +10,5 @@ layout (std140) uniform Projection
 void main()
 {
     gl_Position = projection * vec4(vertex.xy, 0.0, 1.0);
+    coords = vertex.zw;
 }
\ No newline at end of file