draklaw
/
vk_expe
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

Simplified code.

master
Draklaw 4 years ago
parent
803a3cf87e
commit
6f4a8461a9
5 changed files with 74 additions and 230 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 84
      src/Mesh.h
  2. 74
      src/Planet.cpp
  3. 89
      src/Planet.h
  4. 43
      src/VulkanTutorial.cpp
  5. 12
      src/core.h

84
src/Mesh.h
View File

@ -1,84 +0,0 @@
#pragma once
#include <core.h>
#include <vector>
#include <cassert>
template<typename TScalar, typename TIndex>
class GenericMesh {
public:
using Scalar = TScalar;
using Index = TIndex;
using Vector = Eigen::Matrix<Scalar, 3, 1>;
public:
GenericMesh() = default;
GenericMesh(const GenericMesh&) = delete;
GenericMesh(GenericMesh&&) = default;
~GenericMesh() = default;
GenericMesh& operator=(const GenericMesh&) = delete;
GenericMesh& operator=(GenericMesh&&) = default;
inline size_t vertexCount() const {
return m_positions.size();
}
inline size_t indexCount() const {
return m_indices.size();
}
inline void resizeVertex(Index vertexCount) {
m_positions.resize(vertexCount);
}
inline void resizeIndices(Index indexCount) {
m_indices.resize(indexCount);
}
inline const Vector& position(Index vertexIndex) const {
assert(vertexIndex < m_positions.size());
return m_positions[vertexIndex];
}
inline Vector& position(Index vertexIndex) {
assert(vertexIndex < m_positions.size());
return m_positions[vertexIndex];
}
inline Index index(Index indexIndex) const {
assert(indexIndex < m_indices.size());
return m_indices[indexIndex];
}
inline Index& index(Index indexIndex) {
assert(indexIndex < m_indices.size());
return m_indices[indexIndex];
}
inline const Vector* positionData() const {
return m_positions.data();
}
inline Vector* positionData() {
return m_positions.data();
}
inline const Index* indexData() const {
return m_indices.data();
}
inline Index* indexData() {
return m_indices.data();
}
inline const std::vector<Vector>& positions() const {
return m_positions;
}
inline const std::vector<Index>& indices() const {
return m_indices;
}
private:
std::vector<Vector> m_positions;
std::vector<Index> m_indices;
};
using Mesh = GenericMesh<Real, uint32_t>;

74
src/Planet.cpp
View File

@ -6,27 +6,6 @@
#include <vector>
MeshView::MeshView(
Index vertex_count,
Byte* positions, Index position_stride,
Byte* normals, Index normal_stride,
Byte* colors, Index color_stride,
Index index_count,
Byte* indices, Index index_stride
)
: m_vertex_count(vertex_count)
, m_positions(positions)
, m_position_stride(position_stride)
, m_normals(normals)
, m_normal_stride(normal_stride)
, m_colors(colors)
, m_color_stride(color_stride)
, m_index_count(index_count)
, m_indices(indices)
, m_index_stride(index_stride)
{}
Cell::Cell(
const Vector3& corner00,
const Vector3& corner01,
@ -58,7 +37,10 @@ size_t Cell::triangle_count(uint32_t subdiv_count) {
return 2 * s2 * s2;
}
void Cell::build_mesh(MeshView& mesh, uint32_t subdiv_count, Index index_offset) const {
void Cell::build_mesh(
Vector3AV positions, TriangleAV triangles,
uint32_t subdiv_count, Index index_offset
) const {
auto const side_edge_count = (1u << subdiv_count);
auto const side_vert_count = side_edge_count + 1;
@ -66,19 +48,19 @@ void Cell::build_mesh(MeshView& mesh, uint32_t subdiv_count, Index index_offset)
auto const tri_count = 2 * quad_count;
auto const vert_count = side_vert_count * side_vert_count;
assert(mesh.vertex_count() == vert_count);
assert(mesh.index_count() == 3 * tri_count);
assert(positions.size() == vert_count);
assert(triangles.size() == tri_count);
auto const index = [side_vert_count](uint32_t x, uint32_t y) -> uint32_t {
return x + y * side_vert_count;
};
auto const vertex = [&mesh, &index](uint32_t x, uint32_t y) -> Vector3& {
return mesh.position(index(x, y));
auto const vertex = [&positions, &index](uint32_t x, uint32_t y) -> Vector3& {
return positions[index(x, y)];
};
vertex( 0, 0) = m_corners[0];
vertex(side_edge_count, 0) = m_corners[1];
vertex( 0, side_edge_count) = m_corners[2];
vertex( 0, 0) = m_corners[0];
vertex(side_edge_count, 0) = m_corners[1];
vertex( 0, side_edge_count) = m_corners[2];
vertex(side_edge_count, side_edge_count) = m_corners[3];
struct QuadCell {
@ -124,7 +106,7 @@ void Cell::build_mesh(MeshView& mesh, uint32_t subdiv_count, Index index_offset)
}
}
auto indexIndex = 0;
auto triangleIndex = 0;
for(uint32_t y = 0; y < side_edge_count; y += 1) {
for(uint32_t x = 0; x < side_edge_count; x += 1) {
const auto i00 = index_offset + index(x, y);
@ -132,13 +114,8 @@ void Cell::build_mesh(MeshView& mesh, uint32_t subdiv_count, Index index_offset)
const auto i10 = i00 + side_vert_count;
const auto i11 = i10 + 1;
mesh.index(indexIndex++) = i00;
mesh.index(indexIndex++) = i01;
mesh.index(indexIndex++) = i10;
mesh.index(indexIndex++) = i10;
mesh.index(indexIndex++) = i01;
mesh.index(indexIndex++) = i11;
triangles[triangleIndex++] = Triangle { i00, i01, i10 };
triangles[triangleIndex++] = Triangle { i10, i01, i11 };
}
}
}
@ -191,16 +168,25 @@ Planet::Planet()
}
{}
void Planet::build_mesh(MeshView& mesh, uint32_t subdiv_count, Index index_offset) const {
void Planet::build_mesh(
Vector3AV positions, TriangleAV triangles,
uint32_t subdiv_count, Index index_offset
) const {
auto const vertex_count = Cell::vertex_count(subdiv_count);
auto const index_count = 3 * Cell::triangle_count(subdiv_count);
auto const index_count = Cell::triangle_count(subdiv_count);
for(Index cell_index = 0; cell_index < CellCount; cell_index += 1) {
auto sub_mesh = mesh.view(
vertex_count, cell_index * vertex_count,
index_count, cell_index * index_count
auto sub_positions = positions.slice(
cell_index * vertex_count, vertex_count
);
auto sub_triangles = triangles.slice(
cell_index * index_count, index_count
);
cell(cell_index).build_mesh(
sub_positions,
sub_triangles,
subdiv_count,
index_offset + cell_index * vertex_count
);
cell(cell_index).build_mesh(sub_mesh, subdiv_count,
index_offset + cell_index * vertex_count);
}
}

89
src/Planet.h
View File

@ -16,87 +16,6 @@ struct Vertex {
};
class MeshView {
public:
MeshView(
Index vertex_count,
Byte* positions, Index position_stride,
Byte* normals, Index normal_stride,
Byte* colors, Index color_stride,
Index index_count,
Byte* indices, Index index_stride
);
~MeshView() = default;
inline Index vertex_count() const {
return m_vertex_count;
}
inline Index index_count() const {
return m_index_count;
}
MeshView view(
Index vertex_count, Index vertex_index,
Index index_count, Index index_index
) {
assert(vertex_index + vertex_count <= m_vertex_count);
assert(index_index + index_count <= m_index_count);
return MeshView(
vertex_count,
m_positions + (vertex_index * m_position_stride),
m_position_stride,
m_normals + (vertex_index * m_normal_stride),
m_normal_stride,
m_colors + (vertex_index * m_color_stride),
m_color_stride,
index_count,
m_indices + (index_index * m_index_stride),
m_index_stride
);
}
inline Vector3& position(Index vertex_index) {
assert(vertex_index < m_vertex_count);
return *reinterpret_cast<Vector3*>(
m_positions + (vertex_index * m_position_stride)
);
}
inline Vector3& normal(Index vertex_index) {
assert(vertex_index < m_vertex_count);
return *reinterpret_cast<Vector3*>(
m_normals + (vertex_index * m_normal_stride)
);
}
inline Vector3& color(Index vertex_index) {
assert(vertex_index < m_vertex_count);
return *reinterpret_cast<Vector3*>(
m_colors + (vertex_index * m_color_stride)
);
}
inline Index& index(Index index_index) {
assert(index_index < m_index_count);
return *reinterpret_cast<Index*>(
m_indices + (index_index * m_index_stride)
);
}
private:
Index m_vertex_count;
Byte* m_positions;
Index m_position_stride;
Byte* m_normals;
Index m_normal_stride;
Byte* m_colors;
Index m_color_stride;
Index m_index_count;
Byte* m_indices;
Index m_index_stride;
};
class Cell {
public:
static constexpr uint32_t CornerCount = 4;
@ -121,7 +40,10 @@ public:
static size_t vertex_count(uint32_t subdiv_count);
static size_t triangle_count(uint32_t subdiv_count);
void build_mesh(MeshView& mesh, uint32_t subdiv_count=4, Index index_offset=0) const;
void build_mesh(
Vector3AV positions, TriangleAV triangles,
uint32_t subdiv_count=4, Index index_offset=0
) const;
private:
static Real height_factor(Vector3 corners[CornerCount]);
@ -156,7 +78,8 @@ public:
return m_cells[cell_index];
}
void build_mesh(MeshView& mesh, uint32_t subdiv_count=4, Index index_offset=0) const;
void build_mesh(Vector3AV positions, TriangleAV triangles,
uint32_t subdiv_count=4, Index index_offset=0) const;
private:
Cell m_cells[CellCount];

43
src/VulkanTutorial.cpp
View File

@ -91,25 +91,40 @@ VulkanTutorial::VulkanTutorial() {
vertices.resize(6 * Cell::vertex_count(subdiv_count));
indices.resize(6 * 3 * Cell::triangle_count(subdiv_count));
MeshView mesh(
vertices.size(),
reinterpret_cast<Byte*>(vertices.data()) + offsetof(Vertex, position),
sizeof(Vertex),
nullptr,
sizeof(Vertex),
reinterpret_cast<Byte*>(vertices.data()) + offsetof(Vertex, color),
sizeof(Vertex),
indices.size(),
reinterpret_cast<Byte*>(indices.data()),
sizeof(Index)
// MeshView mesh(
// vertices.size(),
// reinterpret_cast<Byte*>(vertices.data()) + offsetof(Vertex, position),
// sizeof(Vertex),
// nullptr,
// sizeof(Vertex),
// reinterpret_cast<Byte*>(vertices.data()) + offsetof(Vertex, color),
// sizeof(Vertex),
// indices.size(),
// reinterpret_cast<Byte*>(indices.data()),
// sizeof(Index)
// );
Vector3AV positions(
vertices.size(), vertices.data(),
sizeof(Vertex), offsetof(Vertex, position)
);
Vector3AV colors(
vertices.size(), vertices.data(),
sizeof(Vertex), offsetof(Vertex, color)
);
TriangleAV triangles(
indices.size() / 3,
indices.data()
);
Planet planet;
planet.build_mesh(mesh, subdiv_count);
planet.build_mesh(positions, triangles, subdiv_count);
for (size_t vertex_index = 0; vertex_index < vertices.size(); vertex_index += 1) {
mesh.color(vertex_index) =
mesh.position(vertex_index) / 2.0f + Vector3::Constant(0.5f);
colors[vertex_index] =
positions[vertex_index] / 2.0f + Vector3::Constant(0.5f);
}
// for(size_t vi = 0; vi < vertices.size(); vi += 1)

12
src/core.h
View File

@ -10,6 +10,7 @@ using Byte = unsigned char;
using Index = uint32_t;
using Real = float;
using Vector3 = Eigen::Matrix<Real, 3, 1>;
using Triangle = Eigen::Array<Index, 3, 1>;
template<typename Scalar, typename Derived0, typename Derived1>
@ -43,8 +44,8 @@ public:
~ArrayView() = default;
template<typename U>
ArrayView(Index size, U* data, Index stride=sizeof(T))
: m_data(reinterpret_cast<Byte*>(data))
ArrayView(Index size, U* data, Index stride=sizeof(T), Index byte_offset=0)
: m_data(reinterpret_cast<Byte*>(data) + byte_offset)
, m_size(size)
, m_stride(stride)
{
@ -85,12 +86,12 @@ public:
}
T& operator[](Index index) {
return const_cast<T&>(const_cast<ArrayView&>(*this)[index]);
return const_cast<T&>(const_cast<const ArrayView&>(*this)[index]);
}
ArrayView slice(Index start, Index count, Index step=1) {
assert(step > 0);
assert(start + count * step < m_size);
assert(start + count * step <= m_size);
return ArrayView(
count,
m_data + start * m_stride,
@ -103,3 +104,6 @@ private:
Index m_size = 0;
Index m_stride = sizeof(T);
};
using Vector3AV = ArrayView<Vector3>;
using TriangleAV = ArrayView<Triangle>;

Write Preview
Loading…
Cancel
Save