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Cleaning up particle code

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This commit is contained in:
Philip Rosedale 2013-10-09 14:28:00 -07:00
parent bcb3e082f6
commit 58d6c4c97a
7 changed files with 55 additions and 108 deletions
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9
interface/src/Application.cpp
View file

@ -1988,7 +1988,9 @@ void Application::update(float deltaTime) {
}
// Simulate particle cloud movements
_cloud.simulate(deltaTime);
if (Menu::getInstance()->isOptionChecked(MenuOption::ParticleCloud)) {
_cloud.simulate(deltaTime);
}
// no transmitter drive implies transmitter pick
if (!Menu::getInstance()->isOptionChecked(MenuOption::TransmitterDrive) && _myTransmitter.isConnected()) {
@ -2508,8 +2510,9 @@ void Application::displaySide(Camera& whichCamera) {
//renderGroundPlaneGrid(EDGE_SIZE_GROUND_PLANE, _audio.getCollisionSoundMagnitude());
}
// Draw Cloud Particles
_cloud.render();
if (Menu::getInstance()->isOptionChecked(MenuOption::ParticleCloud)) {
_cloud.render();
}
// Draw voxels
if (Menu::getInstance()->isOptionChecked(MenuOption::Voxels)) {
PerformanceWarning warn(Menu::getInstance()->isOptionChecked(MenuOption::PipelineWarnings),

12
interface/src/Cloud.cpp
View file

@ -20,12 +20,12 @@ const int NUM_PARTICLES = 20000;
Cloud::Cloud() {
// Create and initialize particles
unsigned int i;
glm::vec3 box = glm::vec3(WORLD_SIZE);
glm::vec3 box = glm::vec3(PARTICLE_WORLD_SIZE);
bounds = box;
count = NUM_PARTICLES;
wrapBounds = false;
particles = new Particle[count];
field = new Field();
field = new Field(PARTICLE_WORLD_SIZE);
for (i = 0; i < count; i++) {
float x = randFloat()*box.x;
@ -37,12 +37,12 @@ Cloud::Cloud() {
const float INIT_VEL_SCALE = 0.10;
particles[i].velocity = randVector();
particles[i].velocity *= WORLD_SIZE * INIT_VEL_SCALE;
particles[i].velocity *= PARTICLE_WORLD_SIZE * INIT_VEL_SCALE;
float color_mult = 1 - COLOR_MIN;
particles[i].color = glm::vec3(x*color_mult/WORLD_SIZE + COLOR_MIN,
y*color_mult/WORLD_SIZE + COLOR_MIN,
z*color_mult/WORLD_SIZE + COLOR_MIN);
particles[i].color = glm::vec3(x*color_mult/PARTICLE_WORLD_SIZE + COLOR_MIN,
y*color_mult/PARTICLE_WORLD_SIZE + COLOR_MIN,
z*color_mult/PARTICLE_WORLD_SIZE + COLOR_MIN);
}
}

2
interface/src/Cloud.h
View file

@ -11,6 +11,8 @@
#include "Field.h"
#define PARTICLE_WORLD_SIZE 128.0
class Cloud {
public:
Cloud();

130
interface/src/Field.cpp
View file

@ -9,13 +9,9 @@
#include "Field.h"
#define FIELD_SCALE 0.00050
#define FIELD_SCALEf 0.1f
#define COLOR_DRIFT_RATE 0.001f // per-frame drift of particle color towards field element color
#define COLOR_MIN 0.2f // minimum R/G/B value at 0,0,0 - also needs setting in cloud.cpp
#define USE_SCALAR 0
#define WORLD_SIZE 100.0
// A vector-valued field over an array of elements arranged as a 3D lattice
@ -23,9 +19,10 @@ int Field::value(float *value, float *pos)
// sets the vector value (3 floats) to field value at location pos in space.
// returns zero if the location is outside world bounds
{
int index = (int)(pos[0]/WORLD_SIZE*10.0) +
(int)(pos[1]/WORLD_SIZE*10.0)*10 +
(int)(pos[2]/WORLD_SIZE*10.0)*100;
int index = (int)(pos[0] / _worldSize * 10.0) +
(int)(pos[1] / _worldSize * 10.0) * 10 +
(int)(pos[2] / _worldSize * 10.0) * 100;
if ((index >= 0) && (index < FIELD_ELEMENTS))
{
value[0] = field[index].val.x;
@ -36,24 +33,25 @@ int Field::value(float *value, float *pos)
else return 0;
}
Field::Field()
Field::Field(float worldSize)
// Initializes the field to some random values
{
_worldSize = worldSize;
int i;
float fx, fy, fz;
for (i = 0; i < FIELD_ELEMENTS; i++)
{
field[i].val.x = (randFloat() - 0.5f)*FIELD_SCALEf * WORLD_SIZE;
field[i].val.y = (randFloat() - 0.5f)*FIELD_SCALEf * WORLD_SIZE;
field[i].val.z = (randFloat() - 0.5f)*FIELD_SCALEf * WORLD_SIZE;
const float FIELD_INITIAL_MAG = 0.3f;
field[i].val = randVector() * FIELD_INITIAL_MAG * _worldSize;
field[i].scalar = 0;
// Record center point for this field cell
fx = static_cast<float>(i % 10);
fy = static_cast<float>(i%100 / 10);
fy = static_cast<float>(i % 100 / 10);
fz = static_cast<float>(i / 100);
field[i].center.x = fx + 0.5f;
field[i].center.y = fy + 0.5f;
field[i].center.z = fz + 0.5f;
field[i].center.x = (fx + 0.5f);
field[i].center.y = (fy + 0.5f);
field[i].center.z = (fz + 0.5f);
field[i].center *= _worldSize / 10.f;
// and set up the RGB values for each field element.
float color_mult = 1 - COLOR_MIN;
@ -66,9 +64,10 @@ Field::Field()
void Field::add(float* add, float *pos)
// At location loc, add vector add to the field values
{
int index = (int)(pos[0]/WORLD_SIZE*10.0) +
(int)(pos[1]/WORLD_SIZE*10.0)*10 +
(int)(pos[2]/WORLD_SIZE*10.0)*100;
int index = (int)(pos[0] / _worldSize * 10.0) +
(int)(pos[1] / _worldSize * 10.0)*10 +
(int)(pos[2] / _worldSize * 10.0)*100;
if ((index >= 0) && (index < FIELD_ELEMENTS))
{
field[index].val.x += add[0];
@ -79,9 +78,9 @@ void Field::add(float* add, float *pos)
void Field::interact(float dt, glm::vec3 * pos, glm::vec3 * vel, glm::vec3 * color, float coupling) {
int index = (int)(pos->x/WORLD_SIZE*10.0) +
(int)(pos->y/WORLD_SIZE*10.0)*10 +
(int)(pos->z/WORLD_SIZE*10.0)*100;
int index = (int)(pos->x/ _worldSize * 10.0) +
(int)(pos->y/_worldSize*10.0)*10 +
(int)(pos->z/_worldSize*10.0)*100;
if ((index >= 0) && (index < FIELD_ELEMENTS)) {
//
// Vector Coupling with particle velocity
@ -95,13 +94,6 @@ void Field::interact(float dt, glm::vec3 * pos, glm::vec3 * vel, glm::vec3 * col
// Scalar coupling: Damp particle as function of local density
//
if (USE_SCALAR) {
//*vel *= (1.f + field[index].scalar*0.01*dt);
const float SCALAR_PARTICLE_ADD = 1.0;
field[index].scalar += SCALAR_PARTICLE_ADD*dt;
}
// add a fraction of the field color to the particle color
//*color = (*color * (1 - COLOR_DRIFT_RATE)) + (fieldcolors[index].rgb * COLOR_DRIFT_RATE);
}
@ -134,80 +126,31 @@ void Field::avg_neighbors(int index, glm::vec3 * result) {
void Field::simulate(float dt) {
glm::vec3 neighbors, add, diff;
float size, distance;
int i, j;
for (i = 0; i < FIELD_ELEMENTS; i++)
for (int i = 0; i < FIELD_ELEMENTS; i++)
{
if (0) { //(randFloat() > 0.01) {
avg_neighbors(i, &neighbors);
size = powf(field[i].val.x*field[i].val.x +
field[i].val.y*field[i].val.y +
field[i].val.z*field[i].val.z, 0.5);
neighbors *= 0.0001;
field[i].val = glm::normalize(field[i].val);
field[i].val *= size * 0.99;
add = glm::normalize(neighbors);
add *= size * 0.01;
field[i].val += add;
}
else {
const float CONSTANT_DAMPING = 0.5;
const float CONSTANT_SCALAR_DAMPING = 2.5;
field[i].val *= (1.f - CONSTANT_DAMPING*dt);
field[i].scalar *= (1.f - CONSTANT_SCALAR_DAMPING*dt);
}
if (USE_SCALAR) {
//
// Compute a field value from sum of all other field values (electrostatics, etc)
//
field[i].fld.x = field[i].fld.y = field[i].fld.z = 0;
for (j = 0; j < FIELD_ELEMENTS; j++)
{
if (i != j) {
// Compute vector field from scalar densities
diff = field[j].center - field[i].center;
distance = glm::length(diff);
diff = glm::normalize(diff);
field[i].fld += diff*field[j].scalar*(1/distance);
}
}
}
}
const float CONSTANT_DAMPING = 0.5;
const float CONSTANT_SCALAR_DAMPING = 2.5;
field[i].val *= (1.f - CONSTANT_DAMPING*dt);
field[i].scalar *= (1.f - CONSTANT_SCALAR_DAMPING*dt);
}
}
void Field::render()
// Render the field lines
{
int i;
float fx, fy, fz;
float scale_view = 0.1f * WORLD_SIZE;
float scale_view = 0.05f * _worldSize;
glDisable(GL_LIGHTING);
glBegin(GL_LINES);
for (i = 0; i < FIELD_ELEMENTS; i++)
{
fx = field[i].center.x * WORLD_SIZE;
fy = field[i].center.y * WORLD_SIZE;
fz = field[i].center.z * WORLD_SIZE;
{
glColor3f(0, 1, 0);
glVertex3f(fx, fy, fz);
glVertex3f(fx + field[i].val.x * scale_view,
fy + field[i].val.y * scale_view,
fz + field[i].val.z * scale_view);
if (USE_SCALAR) {
glColor3f(1, 0, 0);
glVertex3f(fx, fy, fz);
glVertex3f(fx, fy+field[i].scalar*0.01f, fz);
glColor3f(1, 1, 0);
glVertex3f(fx, fy, fz);
glVertex3f(fx + field[i].fld.x*0.0001f,
fy + field[i].fld.y*0.0001f,
fz + field[i].fld.z*0.0001f);
}
glVertex3fv(&field[i].center.x);
glVertex3f(field[i].center.x + field[i].val.x * scale_view,
field[i].center.y + field[i].val.y * scale_view,
field[i].center.z + field[i].val.z * scale_view);
}
glEnd();
@ -215,14 +158,9 @@ void Field::render()
glPointSize(4.0);
glEnable(GL_POINT_SMOOTH);
glBegin(GL_POINTS);
for (i = 0; i < FIELD_ELEMENTS; i++)
{
fx = static_cast<float>(i % 10);
fy = static_cast<float>(i%100 / 10);
fz = static_cast<float>(i / 100);
glVertex3f(fx / 10.f * WORLD_SIZE, fy / 10.f * WORLD_SIZE, fz / 10.f * WORLD_SIZE);
glVertex3fv(&field[i].center.x);
}
glEnd();
}

6
interface/src/Field.h
View file

@ -15,8 +15,6 @@
#include "world.h"
#include "Util.h"
#define WORLD_SIZE 100.0
// Field is a lattice of vectors uniformly distributed FIELD_ELEMENTS^(1/3) on side
const int FIELD_ELEMENTS = 1000;
@ -34,7 +32,8 @@ class Field {
glm::vec3 rgb;
} fieldcolors[FIELD_ELEMENTS];
Field();
Field(float worldSize);
int value(float *ret, float *pos);
void render();
void add(float* add, float *loc);
@ -43,6 +42,7 @@ class Field {
glm::vec3 hsv2rgb(glm::vec3 in);
private:
void avg_neighbors(int index, glm::vec3 * result);
float _worldSize;
};
#endif

3
interface/src/Menu.cpp
View file

@ -234,6 +234,9 @@ Menu::Menu() :
0,
appInstance->getGlowEffect(),
SLOT(cycleRenderMode()));
addCheckableActionToQMenuAndActionHash(renderOptionsMenu, MenuOption::ParticleCloud, 0, false);
QMenu* voxelOptionsMenu = developerMenu->addMenu("Voxel Options");

1
interface/src/Menu.h
View file

@ -169,6 +169,7 @@ namespace MenuOption {
const QString GoHome = "Go Home";
const QString Gravity = "Use Gravity";
const QString GroundPlane = "Ground Plane";
const QString ParticleCloud = "Particle Cloud";
const QString GyroLook = "Smooth Gyro Look";
const QString ListenModeNormal = "Listen Mode Normal";
const QString ListenModePoint = "Listen Mode Point";