Files
vb01/node.cpp
T
2022-03-11 07:57:01 +02:00

397 lines
9.2 KiB
C++
Executable File

#include "root.h"
#include "node.h"
#include "mesh.h"
#include "particleEmitter.h"
#include "light.h"
#include "text.h"
#include "material.h"
#include "matrix.h"
#include "skeleton.h"
#include "animationController.h"
#include <glm.hpp>
#include <glm/gtc/matrix_inverse.hpp>
using namespace std;
using namespace glm;
namespace vb01{
Node::Node(Vector3 pos, Quaternion orientation, Vector3 scale, string name) : Animatable(name){
this->pos = pos;
this->scale = scale;
this->orientation = orientation;
globalAxis[0] = Vector3::VEC_I;
globalAxis[1] = Vector3::VEC_J;
globalAxis[2] = Vector3::VEC_K;
}
Node::~Node(){
for(Mesh *m : meshes)
delete m;
for(Light *l : lights)
delete l;
for(ParticleEmitter *p : emitters)
delete p;
for(Text *t : texts)
delete t;
for(Node *c : children)
delete c;
}
void Node::update(){
if(visible){
for(Light *l : lights)
l->update();
for(Mesh *m : meshes)
m->update();
for(Text *t : texts)
t->update();
for(ParticleEmitter *p : emitters)
p->update();
for(Skeleton *sk : skeletons)
sk->update();
for(Node *c : children)
c->update();
}
for(Driver *driver : drivers)
driver->drive(getDriverValue(driver->getType()));
}
float Node::getDriverValue(Driver::VariableType type){
float driverValue;
switch(type){
case Driver::POS_X:
driverValue = pos.x;
break;
case Driver::POS_Y:
driverValue = pos.y;
break;
case Driver::POS_Z:
driverValue = pos.z;
break;
case Driver::ROT_W:
driverValue = orientation.w;
break;
case Driver::ROT_X:
driverValue = orientation.x;
break;
case Driver::ROT_Y:
driverValue = orientation.y;
break;
case Driver::ROT_Z:
driverValue = orientation.z;
break;
case Driver::SCALE_X:
driverValue = scale.x;
break;
case Driver::SCALE_Y:
driverValue = scale.y;
break;
case Driver::SCALE_Z:
driverValue = scale.z;
break;
}
return driverValue;
}
void Node::attachChild(Node *child){
child->setParent(this);
children.push_back(child);
child->updateAxis();
child->onAttached();
}
void Node::dettachChild(Node *child){
child->setParent(nullptr);
int id = -1;
for(int i = 0; i < children.size(); i++)
if(children[i] == child){
id = i;
break;
}
if(id != -1)
children.erase(children.begin() + id);
}
void Node::attachMesh(Mesh *mesh){
meshes.push_back(mesh);
mesh->setNode(this);
}
void Node::addSkeleton(Skeleton *skeleton){
skeletons.push_back(skeleton);
}
void Node::attachParticleEmitter(ParticleEmitter *emitter){
emitters.push_back(emitter);
emitter->setNode(this);
}
void Node::addLight(Light *light){
Root::getSingleton()->shiftNumLights(true);
lights.push_back(light);
light->setNode(this);
updateShaders();
}
void Node::removeLight(int id){
Root::getSingleton()->shiftNumLights(false);
Light *light = lights[id];
light->setNode(nullptr);
lights.erase(lights.begin() + id);
updateShaders();
}
void Node::addText(Text *text){
texts.push_back(text);
text->setNode(this);
}
void Node::lookAt(Vector3 newDir, Vector3 newUp){
adjustDir(newDir);
adjustUp(newUp);
}
void Node::lookAt(Vector3 newDir){
adjustDir(newDir);
}
void Node::adjustDir(Vector3 newDir){
float angle = Vector3(0, 0, 1).getAngleBetween(newDir);
Vector3 rotAxis = Vector3(0, 0, 1).cross(newDir).norm();
if(rotAxis == Vector3::VEC_ZERO)
rotAxis = Vector3::VEC_I;
setOrientation(Quaternion(angle, rotAxis));
}
void Node::adjustUp(Vector3 newUp){
Vector3 xDir = orientation * Vector3(1, 0, 0),
yDir = orientation * Vector3(0, 1, 0),
zDir = orientation * Vector3(0, 0, 1);
//newUp = Vector3(newUp.x, newUp.y, 0).norm();
if(newUp != Vector3::VEC_ZERO){
float angle = yDir.getAngleBetween(newUp);
bool forw = (xDir.getAngleBetween(newUp) < PI / 2);
setOrientation(Quaternion(angle * (forw ? -1 : 1), zDir) * orientation);
}
}
void Node::getDescendants(vector<Node*> &descendants){
for(Node *child : getChildren()){
descendants.push_back(child);
if(!child->getChildren().empty())
child->getDescendants(descendants);
}
}
vector<Node*> Node::getAncestors(Node *topAncestor){
vector<Node*> ancestors;
Node *parent = this;
while(parent){
ancestors.push_back(parent);
if(parent == topAncestor)
break;
parent = parent->getParent();
}
return ancestors;
}
void Node::updateAxis(){
Vector3 parGlobalAxis[3]{
parent ? parent->getGlobalAxis(0) : Vector3::VEC_I,
parent ? parent->getGlobalAxis(1) : Vector3::VEC_J,
parent ? parent->getGlobalAxis(2) : Vector3::VEC_K
};
float rotAngle = orientation.getAngle();
Vector3 rotAxis = orientation.getAxis();
Vector3 newAxis = (parGlobalAxis[0] * rotAxis.x + parGlobalAxis[1] * rotAxis.y + parGlobalAxis[2] * rotAxis.z).norm();
Quaternion rotQuat = Quaternion(rotAngle, newAxis);
for(int i = 0; i < 3; i++)
globalAxis[i] = (rotQuat * parGlobalAxis[i]).norm();
for(Node *ch : children)
ch->updateAxis();
}
Vector3 Node::localToGlobalPosition(Vector3 localPos){
vector<Node*> ancestors = getAncestors();
Vector3 origin = Vector3::VEC_ZERO;
while(!ancestors.empty()){
int id = ancestors.size() - 1;
Node *par = ancestors[id]->getParent();
Vector3 parAxis[] = {
par ? par->getGlobalAxis(0) : Vector3::VEC_I,
par ? par->getGlobalAxis(1) : Vector3::VEC_J,
par ? par->getGlobalAxis(2) : Vector3::VEC_K
};
Vector3 p = ancestors[id]->getPosition();
origin = origin + parAxis[0] * p.x + parAxis[1] * p.y+parAxis[2] * p.z;
ancestors.pop_back();
}
return origin + globalAxis[0] * localPos.x + globalAxis[1] * localPos.y + globalAxis[2] * localPos.z;
}
Vector3 Node::globalToLocalPosition(Vector3 globalPos){
Vector3 currentGlobalPos = localToGlobalPosition(Vector3::VEC_ZERO);
mat3 mat;
mat[0][0] = globalAxis[0].x;
mat[1][0] = globalAxis[0].y;
mat[2][0] = globalAxis[0].z;
mat[0][1] = globalAxis[1].x;
mat[1][1] = globalAxis[1].y;
mat[2][1] = globalAxis[1].z;
mat[0][2] = globalAxis[2].x;
mat[1][2] = globalAxis[2].y;
mat[2][2] = globalAxis[2].z;
mat = inverse(mat);
vec3 local = vec3(globalPos.x - currentGlobalPos.x, globalPos.y - currentGlobalPos.y, globalPos.z - currentGlobalPos.z) * mat;
return Vector3(local.x, local.y, local.z);
}
Quaternion Node::adjustRot(vector<Node*> ancestors, Quaternion adjustableRot, bool localToGlobal){
Quaternion rOrigin = adjustableRot;
while(!ancestors.empty()){
int id = localToGlobal ? 0 : ancestors.size() - 1;
float angle = ancestors[id]->getOrientation().getAngle();
Vector3 axis = ancestors[id]->getOrientation().getAxis();
Quaternion o;
if(localToGlobal){
Node *par = ancestors[id]->getParent();
Vector3 parAxis[]{
par ? par->getGlobalAxis(0) : Vector3::VEC_I,
par ? par->getGlobalAxis(1) : Vector3::VEC_J,
par ? par->getGlobalAxis(2) : Vector3::VEC_K
};
axis = (parAxis[0] * axis.x + parAxis[1] * axis.y + parAxis[2] * axis.z).norm();
o = Quaternion(angle, axis);
rOrigin = rOrigin * o;
ancestors.erase(ancestors.begin());
}
else{
o = Quaternion(angle, axis).conj();
rOrigin = rOrigin * o;
ancestors.pop_back();
}
}
return rOrigin;
}
Quaternion Node::localToGlobalOrientation(Quaternion localRot){
vector<Node*> ancestors = getAncestors();
Quaternion origin = adjustRot(ancestors, Quaternion::QUAT_W, true);
return localRot * origin;
}
Quaternion Node::globalToLocalOrientation(Quaternion globalRot){
vector<Node*> ancestors = getAncestors();
Quaternion origin = adjustRot(ancestors, globalRot, false);
return origin;
}
void Node::updateShaders(){
Root *root = Root::getSingleton();
Node *rootNode = root->getRootNode();
vector<Node*> descendants;
rootNode->getDescendants(descendants);
descendants.push_back(rootNode);
for(Node *n : descendants){
vector<Mesh*> meshes = n->getMeshes();
for(Mesh *m : meshes){
Material *mat = m->getMaterial();
int numLights = root->getNumLights();
string str = "const int numLights = " + to_string(numLights > 0 ? numLights : 1) + ";";
if(mat)
mat->getShader()->editShader(Shader::FRAGMENT_SHADER, 1, str);
}
}
}
void Node::setOrientation(Quaternion q){
this->orientation = q;
updateAxis();
}
void Node::animate(float value, KeyframeChannel keyframeChannel){
Vector3 newPos = pos, newScale = scale;
Quaternion newRot = orientation;
switch(keyframeChannel.type){
case KeyframeChannel::POS_X:
newPos.x = value;
break;
case KeyframeChannel::POS_Y:
newPos.y = value;
break;
case KeyframeChannel::POS_Z:
newPos.z = value;
break;
case KeyframeChannel::ROT_W:
newRot.w = value;
break;
case KeyframeChannel::ROT_X:
newRot.x = value;
break;
case KeyframeChannel::ROT_Y:
newRot.y = value;
break;
case KeyframeChannel::ROT_Z:
newRot.z = value;
break;
case KeyframeChannel::SCALE_X:
newScale.x = value;
break;
case KeyframeChannel::SCALE_Y:
newScale.y = value;
break;
case KeyframeChannel::SCALE_Z:
newScale.z = value;
break;
}
setPosition(newPos);
setOrientation(newRot);
setScale(newScale);
}
}