X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=laserbrain_demo;a=blobdiff_plain;f=src%2Fmetascene.cc;h=eef5e65120cb607d1238be9063f86c2645bf06ba;hp=66be3ef6f19cc0b7c5bf7939d97181b9918e087b;hb=e5c3a6764a288f04cffbf02164fec7a2c2d80dea;hpb=fb11663a3654acd0132e71e5652e35b0ea72d544

diff --git a/src/metascene.cc b/src/metascene.cc
index 66be3ef..eef5e65 100644
--- a/src/metascene.cc
+++ b/src/metascene.cc
@@ -1,11 +1,23 @@
+/*! \file
+ * \brief Metascene implementation
+ *
+ * Loading starts at `MetaScene::load`, which calls `ts_load` (libtreestore)
+ * to load the metascene description tree into memory. Then `proc_node` is
+ * called at the root to recursively process the tree. `scenefile` nodes are
+ * handed over to `proc_scenefile`, which will trigger scene loading for any
+ * nodes with a `file` attribute. Scene loading is handled by requesting the
+ * filename from the scene resource manager, which is of type [SceneSet](\ref SceneSet).
+ */
 #include <assert.h>
 #include <string>
 #include <regex>
 #include "metascene.h"
 #include "scene.h"
+#include "objmesh.h"
 #include "treestore.h"
 #include "logger.h"
 #include "app.h"
+#include "dbg_gui.h"
 
 #if defined(WIN32) || defined(__WIN32__)
 #include <malloc.h>
@@ -13,12 +25,29 @@
 #include <alloca.h>
 #endif
 
-struct MaterialEdit {
-	std::regex name_re;
+enum MaterialEditType {
+	MTL_EDIT_TEXTURE,
+	MTL_EDIT_MIRROR
+};
+
+struct MaterialEditTexture {
 	int attr;
 	Texture *tex;
 };
 
+struct MaterialEditMirror {
+	float reflectivity;
+	int plane;
+};
+
+struct MaterialEdit {
+	std::regex name_re;
+	MaterialEditType type;
+
+	MaterialEditTexture tex;
+	MaterialEditMirror mirror;
+};
+
 static bool proc_node(MetaScene *mscn, struct ts_node *node);
 static bool proc_scenefile(MetaScene *mscn, struct ts_node *node);
 static bool proc_mtledit(MetaScene *mscn, MaterialEdit *med, struct ts_node *node);
@@ -34,14 +63,20 @@ MetaScene::MetaScene()
 {
 	walk_mesh = 0;
 	music = 0;
+	mirrors = 0;
 }
 
 MetaScene::~MetaScene()
 {
 	delete walk_mesh;
 	delete music;
-}
 
+	while(mirrors) {
+		FlatMirror *m = mirrors;
+		mirrors = mirrors->next;
+		delete m;
+	}
+}
 
 bool MetaScene::load(const char *fname)
 {
@@ -64,14 +99,51 @@ bool MetaScene::load(const char *fname)
 
 void MetaScene::update(float dt)
 {
+	bool expanded;
+	static char text[256];
+	if(debug_gui) {
+		ImGui::Begin("MetaScene nodes", 0, 0);
+		ImGui::Columns(2);
+
+		static bool once;
+		if(!once) {
+			float x = ImGui::GetColumnOffset(1);
+			ImGui::SetColumnOffset(1, x * 1.55);
+			once = true;
+		}
+	}
+
 	int nscn = scenes.size();
 	for(int i=0; i<nscn; i++) {
+
+		if(debug_gui) {
+			if(scenes[i]->name.empty()) {
+				sprintf(text, "scene %3d", i);
+			} else {
+				sprintf(text, "scene %3d: %s", i, scenes[i]->name.c_str());
+			}
+			expanded = parent_expanded = ImGui::TreeNode(text);
+			ImGui::NextColumn();
+			ImGui::NextColumn();
+		}
+
 		scenes[i]->update(dt);
+
+		if(debug_gui && expanded) {
+			ImGui::TreePop();
+		}
+	}
+
+	if(debug_gui) {
+		ImGui::Columns(1);
+		ImGui::End();
 	}
 }
 
+// XXX not used, renderer draws
 void MetaScene::draw() const
 {
+	error_log("Don't call MetaScene::draw, use the Renderer\n");
 	int nscn = scenes.size();
 	for(int i=0; i<nscn; i++) {
 		scenes[i]->draw();
@@ -108,7 +180,7 @@ std::list<SceneNode*> MetaScene::match_nodes(const char *qstr) const
 			res.splice(res.end(), tmp);
 		}
 	}
-	return std::move(res);
+	return res;	// hopefully it'll be moved
 }
 
 Scene *MetaScene::extract_nodes(const char *qstr)
@@ -129,6 +201,104 @@ Scene *MetaScene::extract_nodes(const char *qstr)
 	return scn;
 }
 
+int MetaScene::calc_mirror_planes()
+{
+	FlatMirror *planes = 0;
+
+	int num_mirrors = 0;
+	while(mirrors) {
+		FlatMirror *m = mirrors;
+		mirrors = mirrors->next;
+		delete m;
+	}
+	mirrors = 0;
+	objmirror.clear();
+
+	int numscn = scenes.size();
+	for(int i=0; i<numscn; i++) {
+		Scene *scn = scenes[i];
+
+		int numobj = scn->objects.size();
+		for(int j=0; j<numobj; j++) {
+			Object *obj = scn->objects[j];
+
+			if(obj->mtl.flat_mirror && obj->get_type() == OBJ_MESH) {
+				const Mesh *mesh = ((ObjMesh*)obj)->mesh;
+				if(!mesh) continue;
+
+				FlatMirror *mir = new FlatMirror;
+				mir->reflect = obj->mtl.reflect;
+				mir->node = obj->node;
+
+				if(obj->mtl.flat_mirror == MTL_MIRROR_AUTO) {
+					// grab the first triangle and make a plane
+					Triangle face = Triangle(0, (const Vec3*)mesh->get_attrib_data(MESH_ATTR_VERTEX),
+							mesh->get_index_data());
+					face.calc_normal();
+
+					mir->plane.pt = face.v[0];
+					mir->plane.normal = face.normal;
+				} else {
+					int plane_idx = obj->mtl.flat_mirror - MTL_MIRROR_AABB_PX;
+					mir->plane = obj->get_aabox().get_plane(plane_idx);
+				}
+
+				mir->wplane = mir->plane;
+				if(obj->node) {
+					const Mat4 &xform = obj->node->get_matrix();
+					mir->wplane.pt = xform * mir->wplane.pt;
+					mir->wplane.normal = normalize(xform.upper3x3() * mir->wplane.normal);
+				}
+
+				// check to see if we have found this mirror plane already
+				bool found = false;
+				FlatMirror *node = planes;
+				while(node) {
+					float d1 = dot(mir->wplane.normal, mir->wplane.pt);
+					float d2 = dot(node->wplane.normal, node->wplane.pt);
+
+					if(1.0f - dot(mir->wplane.normal, node->wplane.normal) < 1e-4f &&
+							fabs(d1 - d2) < 1e-4) {
+						found = true;
+						break;
+					}
+					node = node->next;
+				}
+
+				debug_log("[%s@%s] mirror plane: local(%g %g %g %g), world(%g %g %g %g)%s\n",
+						obj->get_name(), obj->node ? obj->node->get_name() : "<no-node>",
+						mir->plane.normal.x, mir->plane.normal.y, mir->plane.normal.z,
+						dot(mir->plane.normal, mir->plane.pt), mir->wplane.normal.x, mir->wplane.normal.y,
+						mir->wplane.normal.z, dot(mir->wplane.normal, mir->wplane.pt), found ? " duplicate" : "");
+
+				if(!found) {
+					mir->next = mirrors;
+					mirrors = mir;
+
+					node = new FlatMirror;
+					node->wplane = mir->wplane;
+					node->next = planes;
+					planes = node;
+
+					mir->objects.push_back(obj);
+					objmirror[obj] = mir;	// associate with object
+					++num_mirrors;
+				} else {
+					delete mir;
+				}
+			}
+		}
+	}
+
+	while(planes) {
+		FlatMirror *tmp = planes;
+		planes = planes->next;
+		delete tmp;
+	}
+
+	return num_mirrors;
+}
+
 static bool proc_node(MetaScene *mscn, struct ts_node *node)
 {
 	struct ts_node *c = node->child_list;
@@ -165,6 +335,9 @@ struct SceneData {
 	std::vector<MaterialEdit> mtledit;
 };
 
+/*! Processes a `scenefile` node. And kicks off scene loading (if necessary) by
+ * calling `SceneSet::get`.
+ */
 static bool proc_scenefile(MetaScene *mscn, struct ts_node *node)
 {
 	const char *fname = ts_get_attr_str(node, "file");
@@ -218,7 +391,7 @@ static bool proc_scenefile(MetaScene *mscn, struct ts_node *node)
 			fname = namebuf;
 		}
 
-		// material edits
+		// material edits are kept in a list to be applied when the scene has been loaded
 		struct ts_node *child = node->child_list;
 		while(child) {
 			MaterialEdit medit;
@@ -316,7 +489,6 @@ static bool proc_mtledit(MetaScene *mscn, MaterialEdit *med, struct ts_node *nod
 	if(amtl && amtl->val.type == TS_STRING) {
 		restr = amtl->val.str;
 	}
-
 	med->name_re = std::regex(restr);
 
 	node = node->child_list;
@@ -345,16 +517,67 @@ static bool proc_mtledit(MetaScene *mscn, MaterialEdit *med, struct ts_node *nod
 				}
 			}
 
-			med->attr = textype;
+			med->tex.attr = textype;
 
 			if(!afile || !afile->val.str || !*afile->val.str) {
 				// remove
-				med->tex = 0;
+				med->tex.tex = 0;
 			} else {
-				med->tex = texman.get_texture(afile->val.str, TEX_2D, &mscn->datamap);
+				med->tex.tex = texman.get_texture(afile->val.str, TEX_2D, &mscn->datamap);
 			}
+
+			med->type = MTL_EDIT_TEXTURE;
+			break;
+		}
+
+		if(strcmp(cn->name, "mirror") == 0) {
+			// make this object a flat mirror (hopefully the object is flat otherwise this won't work)
+			float refl = 1.0f;
+			int plane = MTL_MIRROR_AUTO;
+
+			struct ts_attr *aplane = ts_get_attr(cn, "plane");
+			if(aplane) {
+				if(aplane->val.type == TS_NUMBER) {
+					plane = MTL_MIRROR_AABB_PX + aplane->val.inum;
+				} else {
+					char csign, caxis;
+					if(sscanf(aplane->val.str, "aabb%c%c", &csign, &caxis) != 2 || (csign != '+' && csign != '-')) {
+						error_log("invalid reflect plane specifier: %s\n", aplane->val.str);
+						continue;
+					}
+
+					switch(tolower(caxis)) {
+					case 'x':
+						plane = csign == '+' ? MTL_MIRROR_AABB_PX : MTL_MIRROR_AABB_NX;
+						break;
+					case 'y':
+						plane = csign == '+' ? MTL_MIRROR_AABB_PY : MTL_MIRROR_AABB_NY;
+						break;
+					case 'z':
+						plane = csign == '+' ? MTL_MIRROR_AABB_PZ : MTL_MIRROR_AABB_NZ;
+						break;
+					default:
+						error_log("invalid reflect plane specifier: %s\n", aplane->val.str);
+						continue;
+					}
+				}
+			}
+
+			struct ts_attr *arefl = ts_get_attr(cn, "reflect");
+			if(arefl) {
+				if(arefl->val.type == TS_NUMBER) {
+					refl = arefl->val.fnum;
+				} else {
+					error_log("invalid reflect attribute in mirror mtledit: %s\n", arefl->val.str);
+					continue;
+				}
+			}
+
+			med->type = MTL_EDIT_MIRROR;
+			med->mirror.reflectivity = refl;
+			med->mirror.plane = plane;
+			break;
 		}
-		// TODO add more edit modes
 	}
 
 	return true;
@@ -406,13 +629,22 @@ static bool proc_music(MetaScene *mscn, struct ts_node *node)
 static void apply_mtledit(Material *mtl, const MaterialEdit &med)
 {
 	// TODO more edit modes...
-	if(med.tex) {
-		mtl->add_texture(med.tex, med.attr);
-	} else {
-		Texture *tex = mtl->stdtex[med.attr];
-		if(tex) {
-			mtl->remove_texture(tex);
+	switch(med.type) {
+	case MTL_EDIT_TEXTURE:
+		if(med.tex.tex) {
+			mtl->add_texture(med.tex.tex, med.tex.attr);
+		} else {
+			Texture *tex = mtl->stdtex[med.tex.attr];
+			if(tex) {
+				mtl->remove_texture(tex);
+			}
 		}
+		break;
+
+	case MTL_EDIT_MIRROR:
+		mtl->flat_mirror = med.mirror.plane;
+		mtl->reflect = med.mirror.reflectivity;
+		break;
 	}
 }