X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=laserbrain_demo;a=blobdiff_plain;f=src%2Fsnode.cc;h=eee5fcec02b26e266306b5eeaf36f23e1aa89f74;hp=fac6c650b9c7e69b29d410bff6e7e29a9a5b38e1;hb=ad052fc67fe4e76d2f4a01b2381a738da1708cdb;hpb=b7c92831285013b2a0783bccaf3d900545ebb5ba

diff --git a/src/snode.cc b/src/snode.cc
index fac6c65..eee5fce 100644
--- a/src/snode.cc
+++ b/src/snode.cc
@@ -2,19 +2,25 @@
 #include <assert.h>
 #include <algorithm>
 #include "snode.h"
+#include "objmesh.h"
+#include "dbg_gui.h"
 
 SceneNode::SceneNode()
 	: scale(1, 1, 1)
 {
+	scene = 0;
 	parent = 0;
 	name = 0;
+	local_bvol_valid = false;
 }
 
 SceneNode::SceneNode(Object *obj)
 	: scale(1, 1, 1)
 {
+	scene = 0;
 	parent = 0;
 	name = 0;
+	local_bvol_valid = false;
 	add_object(obj);
 }
 
@@ -37,6 +43,8 @@ const char *SceneNode::get_name() const
 
 void SceneNode::add_child(SceneNode *node)
 {
+	if(!node) return;
+
 	if(node->parent) {
 		if(node->parent == this) {
 			return;
@@ -46,14 +54,19 @@ void SceneNode::add_child(SceneNode *node)
 
 	children.push_back(node);
 	node->parent = this;
+	node->scene = scene;
 }
 
 bool SceneNode::remove_child(SceneNode *node)
 {
+	if(!node) return false;
+
 	auto it = std::find(children.begin(), children.end(), node);
 	if(it != children.end()) {
 		assert(node->parent == this);
 		node->parent = 0;
+		node->scene = 0;
+		children.erase(it);
 		return true;
 	}
 	return false;
@@ -84,6 +97,8 @@ void SceneNode::add_object(Object *obj)
 
 	this->obj.push_back(obj);
 	obj->node = this;
+
+	local_bvol_valid = false;
 }
 
 bool SceneNode::remove_object(Object *o)
@@ -98,6 +113,8 @@ bool SceneNode::remove_object(Object *o)
 		return false;
 	}
 	obj.erase(it);
+
+	local_bvol_valid = false;
 	return true;
 }
 
@@ -177,20 +194,60 @@ void SceneNode::update_node(float dt)
 	xform.pre_scale(scale);
 
 	if(parent) {
-		xform = parent->xform * xform;
+		xform = xform * parent->xform;
 	}
 	inv_xform = inverse(xform);
 }
 
 void SceneNode::update(float dt)
 {
+	bool expanded = false;
+
+	if(debug_gui) {
+		if(parent_expanded) {
+			int flags = children.empty() ? ImGuiTreeNodeFlags_Leaf : 0;
+			expanded = ImGui::TreeNodeEx(name ? name : "<nameless node>", flags);
+		}
+	}
+
 	update_node(dt);
 
-	for(size_t i=0; i<children.size(); i++) {
+	int num = children.size();
+	for(int i=0; i<num; i++) {
+		parent_expanded = expanded;
 		children[i]->update(dt);
 	}
+
+	if(debug_gui && expanded) {
+		ImGui::TreePop();
+	}
 }
 
+void SceneNode::apply_xform()
+{
+	update_node();
+
+	// apply post-order to make sure we don't affect the children xform by our reset
+
+	int nchild = children.size();
+	for(int i=0; i<nchild; i++) {
+		children[i]->apply_xform();
+	}
+
+	int nobj = obj.size();
+	for(int i=0; i<nobj; i++) {
+		if(obj[i]->get_type() == OBJ_MESH) {
+			ObjMesh *om = (ObjMesh*)obj[i];
+			if(om->mesh) {
+				om->mesh->apply_xform(xform);
+			}
+		}
+	}
+
+	pos = Vec3(0, 0, 0);
+	rot = Quat::identity;
+	scale = Vec3(1, 1, 1);
+}
 
 bool SceneNode::intersect(const Ray &ray, HitPoint *hit) const
 {
@@ -225,3 +282,55 @@ bool SceneNode::intersect(const Ray &ray, HitPoint *hit) const
 	}
 	return false;
 }
+
+const AABox &SceneNode::calc_local_bounds()
+{
+	local_bvol = AABox(Vec3(FLT_MAX, FLT_MAX, FLT_MAX), Vec3(-FLT_MAX, -FLT_MAX, -FLT_MAX));
+
+	// calculate the axis-aligned bounding box of all objects in this node
+	int nobj = obj.size();
+	for(int i=0; i<nobj; i++) {
+		AABox tmp = obj[i]->get_aabox();
+		calc_bounding_aabox(&local_bvol, &local_bvol, &tmp);
+	}
+
+	local_bvol_valid = true;
+	return local_bvol;
+}
+
+const AABox &SceneNode::get_local_bounds() const
+{
+	if(!local_bvol_valid) {
+		((SceneNode*)this)->calc_local_bounds();
+	}
+	return local_bvol;
+}
+
+AABox SceneNode::get_node_bounds() const
+{
+	get_local_bounds();	// validate local_bvol
+
+	// calculate the transformed local_bvol
+	Box node_bbox = Box(local_bvol, xform);
+
+	// then calculate the axis-aligned bounding box
+	AABox aabox;
+	calc_bounding_aabox(&aabox, &node_bbox);
+	return aabox;
+}
+
+AABox SceneNode::get_bounds() const
+{
+	AABox sub_aabb = AABox(Vec3(FLT_MAX, FLT_MAX, FLT_MAX), Vec3(-FLT_MAX, -FLT_MAX, -FLT_MAX));
+
+	// calculate the bounding box of all children
+	int nchild = children.size();
+	for(int i=0; i<nchild; i++) {
+		AABox tmp = children[i]->get_bounds();
+		calc_bounding_aabox(&sub_aabb, &sub_aabb, &tmp);
+	}
+
+	AABox aabb;
+	calc_bounding_aabox(&aabb, &local_bvol, &sub_aabb);
+	return aabb;
+}