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Verified Commit dc5e3f81 authored by Tobias Frisch's avatar Tobias Frisch
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Added clean configurations for structured and random meshes 


Signed-off-by: default avatarTobias Frisch <tfrisch@uni-koblenz.de>
parent 97d977c5
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1 merge request!103Added project wobble_bobble and refactored some parts of the framework
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projects/wobble_bobble/shaders/particle.inc
+ 4
− 0
View file @ dc5e3f81
......@@ -25,6 +25,9 @@ struct Particle {
#define SIM_TYPE_HYPERELASTIC 0
#define SIM_TYPE_FLUID 1
#define SIM_MODE_RANDOM 0
#define SIM_MODE_ORDERED 1
struct Simulation {
float density;
float size;
......@@ -35,6 +38,7 @@ struct Simulation {
float K;
float E;
float gamma;
int mode;
};
const float PI = 3.1415926535897932384626433832795;
......
projects/wobble_bobble/src/main.cpp
+ 80
− 27
View file @ dc5e3f81
......@@ -25,6 +25,9 @@ struct Particle {
#define SIM_TYPE_HYPERELASTIC 0
#define SIM_TYPE_FLUID 1
#define SIM_MODE_RANDOM 0
#define SIM_MODE_ORDERED 1
struct Simulation {
float density;
float size;
......@@ -35,6 +38,7 @@ struct Simulation {
float K;
float E;
float gamma;
int mode;
};
struct Physics {
......@@ -66,26 +70,46 @@ float randomFloat(float min, float max) {
return min + (max - min) * dist(random_dev) / static_cast<float>(RAND_MAX);
}
float mod(float x, float y) {
return x - std::floor(x / y) * y;
}
void distributeParticlesCube(Particle *particles, size_t count, const glm::vec3& center, float radius,
float mass, const glm::vec3& velocity) {
float mass, const glm::vec3& velocity, bool random) {
const float side = cube_radius(static_cast<float>(count)) * 2.0f;
float volume = 0.0f;
for (size_t i = 0; i < count; i++) {
glm::vec3 offset(
randomFloat(-1.0f, +1.0f),
randomFloat(-1.0f, +1.0f),
randomFloat(-1.0f, +1.0f)
);
glm::vec3 offset;
offset *= radius;
if (random) {
offset.x = randomFloat(-1.0f, +1.0f);
offset.y = randomFloat(-1.0f, +1.0f);
offset.z = randomFloat(-1.0f, +1.0f);
} else {
const float s = static_cast<float>(i) + 0.5f;
offset.x = 2.0f * mod(s, side) / side - 1.0f;
offset.y = 2.0f * mod(s / side, side) / side - 1.0f;
offset.z = 2.0f * mod(s / side / side, side) / side - 1.0f;
}
const float ax = std::abs(offset.x);
const float ay = std::abs(offset.y);
const float az = std::abs(offset.z);
offset *= radius;
const float a = std::max(std::max(ax, ay), az);
float size = 0.0f;
const float size = (radius - a);
if (random) {
const float ax = std::abs(offset.x);
const float ay = std::abs(offset.y);
const float az = std::abs(offset.z);
const float a = std::max(std::max(ax, ay), az);
size = (radius - a);
} else {
size = 2.0f * radius / side;
}
particles[i].position = center + offset;
particles[i].size = size;
......@@ -106,22 +130,45 @@ void distributeParticlesCube(Particle *particles, size_t count, const glm::vec3&
}
void distributeParticlesSphere(Particle *particles, size_t count, const glm::vec3& center, float radius,
float mass, const glm::vec3& velocity) {
float mass, const glm::vec3& velocity, bool random) {
const float side = sphere_radius(static_cast<float>(count)) * 2.0f;
float volume = 0.0f;
for (size_t i = 0; i < count; i++) {
glm::vec3 offset (
randomFloat(-1.0f, +1.0f),
randomFloat(-1.0f, +1.0f),
randomFloat(-1.0f, +1.0f)
);
glm::vec3 offset;
if (random) {
offset.x = randomFloat(-1.0f, +1.0f);
offset.y = randomFloat(-1.0f, +1.0f);
offset.z = randomFloat(-1.0f, +1.0f);
if (glm::length(offset) > 0.0f)
offset = glm::normalize(offset);
offset *= randomFloat(0.0f, 1.0f);
} else {
const float range = 0.5f * side;
const float s = static_cast<float>(i) + 0.5f;
float a = mod(s, range) / range;
float b = mod(s / range, M_PI * range);
float c = mod(s / range / M_PI / range, M_PI * range * 2.0f);
offset.x = a * std::sin(c) * std::sin(b);
offset.y = a * std::cos(b);
offset.z = a * std::cos(c) * std::sin(b);
}
if (glm::length(offset) > 0.0f)
offset = glm::normalize(offset);
offset *= radius;
offset *= randomFloat(0.0f, radius);
float size = 0.0f;
const float size = (radius - glm::length(offset));
if (random) {
size = (radius - glm::length(offset));
} else {
size = 2.0f * radius / side;
}
particles[i].position = center + offset;
particles[i].size = size;
......@@ -186,7 +233,7 @@ vkcv::ComputePipelineHandle createComputePipeline(vkcv::Core& core, vkcv::shader
}
void resetParticles(vkcv::Buffer<Particle>& particles, const glm::vec3& velocity,
float density, float size, int form) {
float density, float size, int form, int mode) {
std::vector<Particle> particles_vec (particles.getCount());
switch (form) {
......@@ -197,7 +244,8 @@ void resetParticles(vkcv::Buffer<Particle>& particles, const glm::vec3& velocity
glm::vec3(0.5f),
size,
density * sphere_volume(size),
velocity
velocity,
(mode == 0)
);
break;
case SIM_FORM_CUBE:
......@@ -207,7 +255,8 @@ void resetParticles(vkcv::Buffer<Particle>& particles, const glm::vec3& velocity
glm::vec3(0.5f),
size,
density * sphere_volume(size),
velocity
velocity,
(mode == 0)
);
break;
default:
......@@ -298,8 +347,9 @@ int main(int argc, const char **argv) {
sim->K = 2.2f;
sim->E = 35.0f;
sim->gamma = 1.330f;
sim->mode = SIM_MODE_RANDOM;
resetParticles(particles, initialVelocity, sim->density, sim->size, sim->form);
resetParticles(particles, initialVelocity, sim->density, sim->size, sim->form, sim->mode);
vkcv::shader::GLSLCompiler compiler;
......@@ -760,8 +810,11 @@ int main(int argc, const char **argv) {
gui.beginGUI();
ImGui::Begin("Settings");
ImGui::BeginGroup();
ImGui::Combo("Mode", &(sim->mode), "Random\0Ordered", 2);
ImGui::Combo("Form", &(sim->form), "Sphere\0Cube", 2);
ImGui::Combo("Type", &(sim->type), "Hyperelastic\0Fluid", 2);
ImGui::EndGroup();
ImGui::Spacing();
......@@ -797,7 +850,7 @@ int main(int argc, const char **argv) {
ImGui::DragFloat3("Initial Velocity", reinterpret_cast<float*>(&initialVelocity), 0.001f);
ImGui::SameLine(0.0f, 10.0f);
if (ImGui::Button("Reset##particle_velocity")) {
resetParticles(particles, initialVelocity, sim->density, sim->size, sim->form);
resetParticles(particles, initialVelocity, sim->density, sim->size, sim->form, sim->mode);
}
ImGui::End();
......
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