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-rw-r--r--gfx/gl/bufferedLocation.cpp16
-rw-r--r--gfx/gl/bufferedLocation.h32
-rw-r--r--gfx/gl/instanceVertices.h124
3 files changed, 58 insertions, 114 deletions
diff --git a/gfx/gl/bufferedLocation.cpp b/gfx/gl/bufferedLocation.cpp
index 7027b4c..eb3dac3 100644
--- a/gfx/gl/bufferedLocation.cpp
+++ b/gfx/gl/bufferedLocation.cpp
@@ -3,15 +3,9 @@
#include "maths.h"
#include <glm/gtx/transform.hpp>
-BufferedLocation::BufferedLocation(InstanceVertices<glm::mat4> & i, glm::vec3 p, glm::vec3 r) :
- BufferedLocation {i, Location {p, r}}
-{
-}
+BufferedLocation::BufferedLocation(glm::vec3 p, glm::vec3 r) : BufferedLocation {Location {p, r}} { }
-BufferedLocation::BufferedLocation(InstanceVertices<glm::mat4> & i, const Location & l) :
- loc {l}, buffer {i.acquire(getTransform())}
-{
-}
+BufferedLocation::BufferedLocation(const Location & l) : loc {l} { }
BufferedLocation::operator const Location &() const
{
@@ -64,12 +58,6 @@ BufferedLocation::setLocation(glm::vec3 p, glm::vec3 r)
updateBuffer();
}
-void
-BufferedLocation::updateBuffer()
-{
- buffer = getTransform();
-}
-
glm::mat4
BufferedLocation::getTransform() const
{
diff --git a/gfx/gl/bufferedLocation.h b/gfx/gl/bufferedLocation.h
index 6d148cd..8096489 100644
--- a/gfx/gl/bufferedLocation.h
+++ b/gfx/gl/bufferedLocation.h
@@ -1,14 +1,16 @@
#pragma once
-#include "instanceVertices.h"
#include "location.h"
+#include <functional>
#include <glm/mat4x4.hpp>
#include <glm/vec3.hpp>
+#include <tuple>
class BufferedLocation {
public:
- BufferedLocation(InstanceVertices<glm::mat4> &, glm::vec3 = {}, glm::vec3 = {});
- BufferedLocation(InstanceVertices<glm::mat4> &, const Location &);
+ BufferedLocation(glm::vec3 = {}, glm::vec3 = {});
+ BufferedLocation(const Location &);
+ virtual ~BufferedLocation() = default;
BufferedLocation & operator=(const Location &);
@@ -23,8 +25,28 @@ public:
glm::mat4 getTransform() const;
private:
- void updateBuffer();
+ virtual void updateBuffer() = 0;
Location loc;
- InstanceVertices<glm::mat4>::InstanceProxy buffer;
+};
+
+template<typename... Target> class BufferedLocationT : public BufferedLocation {
+public:
+ template<typename... LocationArgs>
+ BufferedLocationT(Target &&... target, LocationArgs &&... t) :
+ BufferedLocation {std::forward<LocationArgs>(t)...}, target {std::forward<Target>(target)...}
+ {
+ updateBuffer();
+ }
+
+ using BufferedLocation::operator=;
+
+private:
+ void
+ updateBuffer() override
+ {
+ std::apply(std::invoke<const Target &...>, target) = getTransform();
+ }
+
+ std::tuple<Target...> target;
};
diff --git a/gfx/gl/instanceVertices.h b/gfx/gl/instanceVertices.h
index 9df6e12..7b0341b 100644
--- a/gfx/gl/instanceVertices.h
+++ b/gfx/gl/instanceVertices.h
@@ -1,20 +1,15 @@
#pragma once
-#include "glArrays.h"
+#include "glContainer.h"
+#include "pack.h"
#include <cassert>
-#include <iterator>
-#include <span>
#include <special_members.h>
#include <utility>
-#include <vector>
-template<typename T> class InstanceVertices {
-public:
- InstanceVertices(size_t initialSize = 16)
- {
- allocBuffer(initialSize);
- }
+template<typename T> class InstanceVertices : protected glContainer<T> {
+ using base = glContainer<T>;
+public:
class [[nodiscard]] InstanceProxy {
public:
InstanceProxy(InstanceVertices * iv, std::size_t idx) : instances {iv}, index {idx} { }
@@ -44,27 +39,27 @@ public:
T &
operator=(U && v)
{
- return instances->at(index) = std::forward<U>(v);
+ return instances->lookup(index) = std::forward<U>(v);
}
[[nodiscard]]
operator T &()
{
- return instances->at(index);
+ return instances->lookup(index);
}
[[nodiscard]] operator const T &() const
{
- return instances->at(index);
+ return instances->lookup(index);
}
[[nodiscard]] T *
get()
{
- return &instances->at(index);
+ return &instances->lookup(index);
}
[[nodiscard]] const T *
get() const
{
- return &instances->at(index);
+ return &instances->lookup(index);
}
[[nodiscard]] T *
operator->()
@@ -79,12 +74,12 @@ public:
[[nodiscard]] T &
operator*()
{
- return instances->at(index);
+ return instances->lookup(index);
}
[[nodiscard]] const T &
operator*() const
{
- return instances->at(index);
+ return instances->lookup(index);
}
private:
@@ -96,33 +91,25 @@ public:
[[nodiscard]] InstanceProxy
acquire(Params &&... params)
{
- map();
if (!unused.empty()) {
auto idx = unused.back();
unused.pop_back();
- index[idx] = next++;
- new (&at(idx)) T(std::forward<Params>(params)...);
+ index[idx] = base::size();
+ base::emplace_back(std::forward<Params>(params)...);
return InstanceProxy {this, idx};
}
- if (next >= capacity) {
- resize(capacity * 2);
- }
- index.emplace_back(next++);
- new (data + index.back()) T(std::forward<Params>(params)...);
+ index.emplace_back(base::size());
+ base::emplace_back(std::forward<Params>(params)...);
return InstanceProxy {this, index.size() - 1};
}
- [[nodiscard]] const auto &
- bufferName() const
- {
- return buffer;
- }
+ using base::bufferName;
[[nodiscard]] auto
- count() const
+ size() const
{
- unmap();
- return next;
+ base::unmap();
+ return base::size();
}
protected:
@@ -131,16 +118,13 @@ protected:
void
release(const size_t pidx)
{
- // Destroy p's object
- at(pidx).~T();
- if (--next != index[pidx]) {
- // Move last object into p's slot
- new (&at(pidx)) T {std::move(data[next])};
- (data[next]).~T();
- *std::find_if(index.begin(), index.end(), [this](const auto & i) {
- return i == next && !std::binary_search(unused.begin(), unused.end(), &i - index.data());
+ if (base::size() - 1 != index[pidx]) {
+ lookup(pidx) = std::move(base::back());
+ *std::find_if(index.begin(), index.end(), [this, old = base::size() - 1](const auto & i) {
+ return i == old && !std::binary_search(unused.begin(), unused.end(), &i - index.data());
}) = index[pidx];
}
+ base::pop_back();
if (pidx == index.size() - 1) {
index.pop_back();
}
@@ -150,64 +134,14 @@ protected:
}
}
- void
- allocBuffer(std::size_t newCapacity)
- {
- glBindBuffer(GL_ARRAY_BUFFER, buffer);
- glBufferData(GL_ARRAY_BUFFER, static_cast<GLsizeiptr>(sizeof(T) * newCapacity), nullptr, GL_DYNAMIC_DRAW);
- glBindBuffer(GL_ARRAY_BUFFER, 0);
- capacity = newCapacity;
- data = nullptr;
- }
-
- void
- resize(size_t newCapacity)
- {
- const auto maintain = std::min(newCapacity, capacity);
- std::vector<T> existing;
- const auto maintaind = static_cast<typename decltype(existing)::difference_type>(maintain);
- existing.reserve(maintain);
- map();
- std::move(data, data + maintain, std::back_inserter(existing));
- allocBuffer(newCapacity);
- map();
- std::move(existing.begin(), existing.begin() + maintaind, data);
- capacity = newCapacity;
- }
-
[[nodiscard]] T &
- at(size_t pindex)
- {
- map();
- return data[index[pindex]];
- }
-
- void
- map() const
+ lookup(size_t pindex)
{
- if (!data) {
- data = static_cast<T *>(glMapNamedBuffer(buffer, GL_READ_WRITE));
- assert(data);
- }
- }
-
- void
- unmap() const
- {
- if (data) {
- glUnmapNamedBuffer(buffer);
- data = nullptr;
- }
+ return base::data()[index[pindex]];
}
- glBuffer buffer;
- mutable T * data {};
- // Size of buffer
- std::size_t capacity {};
- // # used of capacity
- std::size_t next {};
- // Index into buffer given to nth proxy
+ // Index into buffer given to nth proxy
std::vector<size_t> index;
- // List of free spaces in index
+ // List of free spaces in index
std::vector<size_t> unused;
};
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