From 8ac57685948a9aa20e7ec5afbf9206ee693530b9 Mon Sep 17 00:00:00 2001
From: Sebastian Gaida <gaida@ca-digit.com>
Date: Mon, 14 Jun 2021 17:54:55 +0200
Subject: [PATCH] [#69] add moving and respawning particles
---
projects/particle_simulation/CMakeLists.txt | 2 +-
projects/particle_simulation/shaders/frag.spv | Bin 1540 -> 1064 bytes
projects/particle_simulation/src/Particle.cpp | 32 ++++++++++++++++++
projects/particle_simulation/src/Particle.hpp | 26 +++++++++-----
.../src/ParticleSystem.cpp | 20 +++++++++--
.../src/ParticleSystem.hpp | 6 +++-
projects/particle_simulation/src/main.cpp | 27 +++++++--------
7 files changed, 85 insertions(+), 28 deletions(-)
create mode 100644 projects/particle_simulation/src/Particle.cpp
diff --git a/projects/particle_simulation/CMakeLists.txt b/projects/particle_simulation/CMakeLists.txt
index 43dfb169..2e62c66e 100644
--- a/projects/particle_simulation/CMakeLists.txt
+++ b/projects/particle_simulation/CMakeLists.txt
@@ -11,7 +11,7 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
# adding source files to the project
add_executable(particle_simulation src/main.cpp
src/ParticleSystem.hpp src/ParticleSystem.cpp
- src/Particle.hpp)
+ src/Particle.hpp src/Particle.cpp)
# this should fix the execution path to load local files from the project (for MSVC)
if(MSVC)
diff --git a/projects/particle_simulation/shaders/frag.spv b/projects/particle_simulation/shaders/frag.spv
index fdf98514955a63d0e54791970d2f1867ca3c5375..1b3a6f369887d3cad66e2f93316261c9c94202ac 100644
GIT binary patch
delta 260
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diff --git a/projects/particle_simulation/src/Particle.cpp b/projects/particle_simulation/src/Particle.cpp
new file mode 100644
index 00000000..cdb69f7b
--- /dev/null
+++ b/projects/particle_simulation/src/Particle.cpp
@@ -0,0 +1,32 @@
+
+#include "Particle.hpp"
+
+Particle::Particle(glm::vec3 position, glm::vec3 velocity, float lifeTime)
+: m_position(position),
+m_velocity(velocity),
+m_lifeTime(lifeTime)
+{}
+
+const glm::vec3& Particle::getPosition()const{
+ return m_position;
+}
+
+const bool Particle::isAlive()const{
+ return m_lifeTime > 0.f;
+}
+
+void Particle::setPosition( const glm::vec3 pos ){
+ m_position = pos;
+}
+
+void Particle::update( const float delta ){
+ m_position += m_velocity * delta;
+}
+
+void Particle::setLifeTime( const float lifeTime ){
+ m_lifeTime = lifeTime;
+}
+
+const float& Particle::getLifeTime()const{
+ return m_lifeTime;
+}
\ No newline at end of file
diff --git a/projects/particle_simulation/src/Particle.hpp b/projects/particle_simulation/src/Particle.hpp
index b392d543..9c08631e 100644
--- a/projects/particle_simulation/src/Particle.hpp
+++ b/projects/particle_simulation/src/Particle.hpp
@@ -1,20 +1,28 @@
#pragma once
+#include <glm/glm.hpp>
+
class Particle {
public:
- Particle(glm::vec3 position, glm::vec3 velocity)
- noexcept
- : m_position(position),
- m_velocity(velocity) {}
-
- const glm::vec3& getPosition()const{
- return m_position;
- };
+ Particle(glm::vec3 position, glm::vec3 velocity, float lifeTime = 1.f);
+
+ const glm::vec3& getPosition()const;
+
+ void setPosition( const glm::vec3 pos );
+
+ void update( const float delta );
+
+ const bool isAlive()const;
+
+ void setLifeTime( const float lifeTime );
+
+ const float& getLifeTime()const;
+
private:
// all properties of the Particle
glm::vec3 m_position;
- float padding = 0.f;
+ float m_lifeTime;
glm::vec3 m_velocity;
float padding_2 = 0.f;
};
\ No newline at end of file
diff --git a/projects/particle_simulation/src/ParticleSystem.cpp b/projects/particle_simulation/src/ParticleSystem.cpp
index 5428b02b..4c3a9286 100644
--- a/projects/particle_simulation/src/ParticleSystem.cpp
+++ b/projects/particle_simulation/src/ParticleSystem.cpp
@@ -1,6 +1,6 @@
#include "ParticleSystem.hpp"
-const std::vector<Particle>& ParticleSystem::getParticles() const {
+const std::vector<Particle>& ParticleSystem::getParticles() const{
return m_particles;
}
@@ -9,4 +9,20 @@ void ParticleSystem::addParticle( const Particle particle ){
}
void ParticleSystem::addParticles( const std::vector<Particle> particles ){
m_particles.insert(m_particles.end(), particles.begin(), particles.end());
-}
\ No newline at end of file
+}
+
+void ParticleSystem::updateParticles( const float deltaTime ){
+ for(Particle& particle :m_particles){
+ bool alive = particle.isAlive();
+ particle.setPosition( particle.getPosition() * static_cast<float>(alive) + static_cast<float>(!alive) * m_respawnPos );
+ particle.setLifeTime( (particle.getLifeTime() * alive + !alive * m_maxLifeTime ) - deltaTime );
+ particle.update(deltaTime);
+ }
+}
+
+void ParticleSystem::setRespawnPos( const glm::vec3 respawnPos){
+ m_respawnPos = respawnPos;
+}
+void ParticleSystem::setMaxLifeTime( const float respawnTime ){
+ m_maxLifeTime = respawnTime;
+}
diff --git a/projects/particle_simulation/src/ParticleSystem.hpp b/projects/particle_simulation/src/ParticleSystem.hpp
index c7e1a2fd..e4ec3b36 100644
--- a/projects/particle_simulation/src/ParticleSystem.hpp
+++ b/projects/particle_simulation/src/ParticleSystem.hpp
@@ -1,6 +1,5 @@
#pragma once
-#include <glm/glm.hpp>
#include <vector>
#include "Particle.hpp"
@@ -10,7 +9,12 @@ public:
const std::vector<Particle> &getParticles() const;
void addParticle( const Particle particle );
void addParticles( const std::vector<Particle> particles );
+ void updateParticles( const float deltaTime );
+ void setRespawnPos( const glm::vec3 respawnPos );
+ void setMaxLifeTime( const float respawnTime );
private:
std::vector<Particle> m_particles;
+ glm::vec3 m_respawnPos = glm::vec3(0.f);
+ float m_maxLifeTime = 1.f;
};
\ No newline at end of file
diff --git a/projects/particle_simulation/src/main.cpp b/projects/particle_simulation/src/main.cpp
index a0db6620..ef718ceb 100644
--- a/projects/particle_simulation/src/main.cpp
+++ b/projects/particle_simulation/src/main.cpp
@@ -57,11 +57,7 @@ int main(int argc, const char** argv) {
particleShaderProgram.reflectShader(vkcv::ShaderStage::VERTEX);
particleShaderProgram.reflectShader(vkcv::ShaderStage::FRAGMENT);
- std::vector<vkcv::DescriptorBinding> descriptorBindings = {
- vkcv::DescriptorBinding(0, vkcv::DescriptorType::UNIFORM_BUFFER, 1, vkcv::ShaderStage::FRAGMENT),
- vkcv::DescriptorBinding(1, vkcv::DescriptorType::UNIFORM_BUFFER, 1, vkcv::ShaderStage::FRAGMENT)};
-
- vkcv::DescriptorSetHandle descriptorSet = core.createDescriptorSet(descriptorBindings);
+ vkcv::DescriptorSetHandle descriptorSet = core.createDescriptorSet(particleShaderProgram.getReflectedDescriptors()[0]);
vkcv::Buffer<glm::vec3> vertexBuffer = core.createBuffer<glm::vec3>(
vkcv::BufferType::VERTEX,
@@ -124,22 +120,19 @@ int main(int argc, const char** argv) {
vkcv::DescriptorSetUsage descriptorUsage(0, core.getDescriptorSet(descriptorSet).vulkanHandle);
//vkcv::DrawcallInfo drawcalls(renderMesh, {vkcv::DescriptorSetUsage(0, core.getDescriptorSet(descriptorSet).vulkanHandle)});
- glm::vec3 instancePosition;
-
glm::vec2 pos = glm::vec2(1.f);
window.e_mouseMove.add([&]( double offsetX, double offsetY) {
pos = glm::vec2(static_cast<float>(offsetX), static_cast<float>(offsetY));
- instancePosition.x = static_cast<float>(offsetX);
- instancePosition.y = static_cast<float>(offsetY);
- instancePosition.z = -1.f;
});
ParticleSystem particleSystem;
+ particleSystem.setMaxLifeTime(3.f);
+ glm::vec3 vel = glm::vec3(0.f , 0.1f, 0.0f);
particleSystem.addParticles({
- Particle(instancePosition, glm::vec3(0.f)),
- Particle(glm::vec3( 0.2f, 0.1f, 0.f), glm::vec3(0.f)),
- Particle(glm::vec3(0.15f, 0.f, 0.1f), glm::vec3(0.f))});
+ Particle(glm::vec3(0.f, 1.f, 0.f), vel, 1.f),
+ Particle(glm::vec3( 0.2f, 0.1f, 0.f), vel, 2.f),
+ Particle(glm::vec3(0.15f, 0.f, 0.1f), vel, 3.f)});
std::vector<glm::mat4> modelMatrices;
std::vector<vkcv::DrawcallInfo> drawcalls;
@@ -152,8 +145,6 @@ int main(int argc, const char** argv) {
glm::vec4 colorData = glm::vec4(1.0f,1.0f,0.0f,1.0f);
-
-
while (window.isWindowOpen())
{
window.pollEvents();
@@ -169,6 +160,12 @@ int main(int argc, const char** argv) {
auto end = std::chrono::system_clock::now();
float deltatime = std::chrono::duration<float>(end - start).count();
start = end;
+ particleSystem.updateParticles( deltatime );
+
+ modelMatrices.clear();
+ for(Particle particle : particleSystem.getParticles()) {
+ modelMatrices.push_back(glm::translate(glm::mat4(1.f), particle.getPosition()));
+ }
//modelmatrix = glm::rotate(modelmatrix, angle, glm::vec3(0,0,1));
--
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