From 44f5ac32a68a617f93704d44c4339f7db13b323e Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sat, 15 Dec 2018 23:09:32 +0100
Subject: Hacky D2Q9 BGK LBM on GPU using GLSL compute shaders

Improvised on top of computicles's scaffolding.

Works in a world where _works_ is defined as "displays stuff on screen that invokes thoughts of fluid movement".
---
 src/buffer/vertex/fluid_cell_buffer.cc | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 src/buffer/vertex/fluid_cell_buffer.cc

(limited to 'src/buffer/vertex/fluid_cell_buffer.cc')

diff --git a/src/buffer/vertex/fluid_cell_buffer.cc b/src/buffer/vertex/fluid_cell_buffer.cc
new file mode 100644
index 0000000..5056569
--- /dev/null
+++ b/src/buffer/vertex/fluid_cell_buffer.cc
@@ -0,0 +1,33 @@
+#include "fluid_cell_buffer.h"
+
+FluidCellBuffer::FluidCellBuffer():
+	_data(3*128*128, GLfloat{}) {
+	glGenVertexArrays(1, &_array);
+	glGenBuffers(1, &_buffer);
+
+	glBindVertexArray(_array);
+	glBindBuffer(GL_ARRAY_BUFFER, _buffer);
+	glBufferData(
+		GL_ARRAY_BUFFER,
+		_data.size() * sizeof(GLfloat),
+		_data.data(),
+		GL_DYNAMIC_DRAW
+	);
+
+	glEnableVertexAttribArray(0);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
+}
+
+FluidCellBuffer::~FluidCellBuffer() {
+	glDeleteBuffers(1, &_buffer);
+	glDeleteVertexArrays(1, &_array);
+}
+
+GLuint FluidCellBuffer::getBuffer() const {
+	return _buffer;
+}
+
+void FluidCellBuffer::draw() const {
+	glBindVertexArray(_array);
+	glDrawArrays(GL_POINTS, 0, _data.size());
+}
-- 
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