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more correct use of BufferView in GeometryCache

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This commit is contained in:
Andrew Meadows 2017-10-10 12:58:37 -07:00
parent 160be95081
commit 026195223a
2 changed files with 47 additions and 36 deletions
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75
libraries/render-utils/src/GeometryCache.cpp
View file

@ -84,67 +84,83 @@ std::vector<vec3> polygon() {
}
void GeometryCache::ShapeData::setupVertices(gpu::BufferPointer& vertexBuffer, const geometry::VertexVector& vertices) {
gpu::Buffer::Size offset = vertexBuffer->getSize();
vertexBuffer->append(vertices);
_positionView = gpu::BufferView(vertexBuffer, 0,
vertexBuffer->getSize(), SHAPE_VERTEX_STRIDE, POSITION_ELEMENT);
_normalView = gpu::BufferView(vertexBuffer, SHAPE_NORMALS_OFFSET,
vertexBuffer->getSize(), SHAPE_VERTEX_STRIDE, NORMAL_ELEMENT);
gpu::Buffer::Size viewSize = vertices.size() * 2 * sizeof(glm::vec3);
_positionView = gpu::BufferView(vertexBuffer, offset,
viewSize, SHAPE_VERTEX_STRIDE, POSITION_ELEMENT);
_normalView = gpu::BufferView(vertexBuffer, offset + SHAPE_NORMALS_OFFSET,
viewSize, SHAPE_VERTEX_STRIDE, NORMAL_ELEMENT);
}
void GeometryCache::ShapeData::setupIndices(gpu::BufferPointer& indexBuffer, const geometry::IndexVector& indices, const geometry::IndexVector& wireIndices) {
_indices = indexBuffer;
gpu::Buffer::Size offset = indexBuffer->getSize();
if (!indices.empty()) {
_indexOffset = indexBuffer->getSize() / SHAPE_INDEX_SIZE;
_indexCount = indices.size();
indexBuffer->append(indices);
for (uint32_t i = 0; i < indices.size(); ++i) {
indexBuffer->append((uint16_t)indices[i]);
}
}
gpu::Size viewSize = indices.size() * sizeof(uint16_t);
_indicesView = gpu::BufferView(indexBuffer, offset, viewSize, gpu::Element::INDEX_UINT16);
offset = indexBuffer->getSize();
if (!wireIndices.empty()) {
_wireIndexOffset = indexBuffer->getSize() / SHAPE_INDEX_SIZE;
_wireIndexCount = wireIndices.size();
indexBuffer->append(wireIndices);
for (uint32_t i = 0; i < wireIndices.size(); ++i) {
indexBuffer->append((uint16_t)wireIndices[i]);
}
}
viewSize = wireIndices.size() * sizeof(uint16_t);
_wireIndicesView = gpu::BufferView(indexBuffer, offset, viewSize, gpu::Element::INDEX_UINT16);
}
void GeometryCache::ShapeData::setupBatch(gpu::Batch& batch) const {
batch.setInputBuffer(gpu::Stream::POSITION, _positionView);
batch.setInputBuffer(gpu::Stream::NORMAL, _normalView);
batch.setIndexBuffer(SHAPE_INDEX_TYPE, _indices, 0);
batch.setIndexBuffer(_indicesView);
}
void GeometryCache::ShapeData::draw(gpu::Batch& batch) const {
if (_indexCount) {
gpu::Buffer::Size numIndices = _indicesView.getNumElements();
if (numIndices > 0) {
setupBatch(batch);
batch.drawIndexed(gpu::TRIANGLES, (gpu::uint32)_indexCount, (gpu::uint32)_indexOffset);
batch.drawIndexed(gpu::TRIANGLES, numIndices, 0);
}
}
void GeometryCache::ShapeData::drawWire(gpu::Batch& batch) const {
if (_wireIndexCount) {
setupBatch(batch);
batch.drawIndexed(gpu::LINES, (gpu::uint32)_wireIndexCount, (gpu::uint32)_wireIndexOffset);
gpu::Buffer::Size numIndices = _wireIndicesView.getNumElements();
if (numIndices > 0) {
batch.setInputBuffer(gpu::Stream::POSITION, _positionView);
batch.setInputBuffer(gpu::Stream::NORMAL, _normalView);
batch.setIndexBuffer(_wireIndicesView);
batch.drawIndexed(gpu::LINES, numIndices, 0);
}
}
void GeometryCache::ShapeData::drawInstances(gpu::Batch& batch, size_t count) const {
if (_indexCount) {
gpu::Buffer::Size numIndices = _indicesView.getNumElements();
if (numIndices > 0) {
setupBatch(batch);
batch.drawIndexedInstanced((gpu::uint32)count, gpu::TRIANGLES, (gpu::uint32)_indexCount, (gpu::uint32)_indexOffset);
batch.drawIndexedInstanced((gpu::uint32)count, gpu::TRIANGLES, numIndices, 0);
}
}
void GeometryCache::ShapeData::drawWireInstances(gpu::Batch& batch, size_t count) const {
if (_wireIndexCount) {
setupBatch(batch);
batch.drawIndexedInstanced((gpu::uint32)count, gpu::LINES, (gpu::uint32)_wireIndexCount, (gpu::uint32)_wireIndexOffset);
gpu::Buffer::Size numIndices = _wireIndicesView.getNumElements();
if (numIndices > 0) {
batch.setInputBuffer(gpu::Stream::POSITION, _positionView);
batch.setInputBuffer(gpu::Stream::NORMAL, _normalView);
batch.setIndexBuffer(_wireIndicesView);
batch.drawIndexedInstanced((gpu::uint32)count, gpu::LINES, numIndices, 0);
}
}
static const size_t ICOSAHEDRON_TO_SPHERE_TESSELATION_COUNT = 3;
size_t GeometryCache::getShapeTriangleCount(Shape shape) {
return _shapes[shape]._indexCount / VERTICES_PER_TRIANGLE;
return _shapes[shape]._indicesView.getNumElements() / VERTICES_PER_TRIANGLE;
}
size_t GeometryCache::getSphereTriangleCount() {
@ -168,7 +184,6 @@ static IndexPair indexToken(geometry::Index a, geometry::Index b) {
template <size_t N>
void setupFlatShape(GeometryCache::ShapeData& shapeData, const geometry::Solid<N>& shape, gpu::BufferPointer& vertexBuffer, gpu::BufferPointer& indexBuffer) {
using namespace geometry;
Index baseVertex = (Index)(vertexBuffer->getSize() / SHAPE_VERTEX_STRIDE);
VertexVector vertices;
IndexVector solidIndices, wireIndices;
IndexPairs wireSeenIndices;
@ -179,6 +194,7 @@ void setupFlatShape(GeometryCache::ShapeData& shapeData, const geometry::Solid<N
vertices.reserve(N * faceCount * 2);
solidIndices.reserve(faceIndexCount * faceCount);
Index baseVertex = 0;
for (size_t f = 0; f < faceCount; f++) {
const Face<N>& face = shape.faces[f];
// Compute the face normal
@ -219,7 +235,6 @@ void setupFlatShape(GeometryCache::ShapeData& shapeData, const geometry::Solid<N
template <size_t N>
void setupSmoothShape(GeometryCache::ShapeData& shapeData, const geometry::Solid<N>& shape, gpu::BufferPointer& vertexBuffer, gpu::BufferPointer& indexBuffer) {
using namespace geometry;
Index baseVertex = (Index)(vertexBuffer->getSize() / SHAPE_VERTEX_STRIDE);
VertexVector vertices;
vertices.reserve(shape.vertices.size() * 2);
@ -236,6 +251,7 @@ void setupSmoothShape(GeometryCache::ShapeData& shapeData, const geometry::Solid
solidIndices.reserve(faceIndexCount * faceCount);
Index baseVertex = 0;
for (size_t f = 0; f < faceCount; f++) {
const Face<N>& face = shape.faces[f];
// Create the wire indices for unseen edges
@ -265,7 +281,6 @@ void setupSmoothShape(GeometryCache::ShapeData& shapeData, const geometry::Solid
template <uint32_t N>
void extrudePolygon(GeometryCache::ShapeData& shapeData, gpu::BufferPointer& vertexBuffer, gpu::BufferPointer& indexBuffer, bool isConical = false) {
using namespace geometry;
Index baseVertex = (Index)(vertexBuffer->getSize() / SHAPE_VERTEX_STRIDE);
VertexVector vertices;
IndexVector solidIndices, wireIndices;
@ -286,6 +301,7 @@ void extrudePolygon(GeometryCache::ShapeData& shapeData, gpu::BufferPointer& ver
vertices.push_back(vec3(v.x, -0.5f, v.z));
vertices.push_back(vec3(0.0f, -1.0f, 0.0f));
}
Index baseVertex = 0;
for (uint32_t i = 2; i < N; i++) {
solidIndices.push_back(baseVertex + 0);
solidIndices.push_back(baseVertex + i);
@ -343,7 +359,6 @@ void drawCircle(GeometryCache::ShapeData& shapeData, gpu::BufferPointer& vertexB
// Draw a circle with radius 1/4th the size of the bounding box
using namespace geometry;
Index baseVertex = (Index)(vertexBuffer->getSize() / SHAPE_VERTEX_STRIDE);
VertexVector vertices;
IndexVector solidIndices, wireIndices;
const int NUM_CIRCLE_VERTICES = 64;
@ -354,6 +369,7 @@ void drawCircle(GeometryCache::ShapeData& shapeData, gpu::BufferPointer& vertexB
vertices.push_back(vec3(0.0f, 0.0f, 0.0f));
}
Index baseVertex = 0;
for (uint32_t i = 2; i < NUM_CIRCLE_VERTICES; i++) {
solidIndices.push_back(baseVertex + 0);
solidIndices.push_back(baseVertex + i);
@ -403,7 +419,6 @@ void GeometryCache::buildShapes() {
// Line
{
Index baseVertex = (Index)(_shapeVertices->getSize() / SHAPE_VERTEX_STRIDE);
ShapeData& shapeData = _shapes[Line];
shapeData.setupVertices(_shapeVertices, VertexVector {
vec3(-0.5f, 0.0f, 0.0f), vec3(-0.5f, 0.0f, 0.0f),
@ -411,8 +426,8 @@ void GeometryCache::buildShapes() {
});
IndexVector wireIndices;
// Only two indices
wireIndices.push_back(0 + baseVertex);
wireIndices.push_back(1 + baseVertex);
wireIndices.push_back(0);
wireIndices.push_back(1);
shapeData.setupIndices(_shapeIndices, IndexVector(), wireIndices);
}

8
libraries/render-utils/src/GeometryCache.h
View file

@ -339,14 +339,10 @@ public:
void useSimpleDrawPipeline(gpu::Batch& batch, bool noBlend = false);
struct ShapeData {
size_t _indexOffset{ 0 };
size_t _indexCount{ 0 };
size_t _wireIndexOffset{ 0 };
size_t _wireIndexCount{ 0 };
gpu::BufferView _positionView;
gpu::BufferView _normalView;
gpu::BufferPointer _indices;
gpu::BufferView _indicesView;
gpu::BufferView _wireIndicesView;
void setupVertices(gpu::BufferPointer& vertexBuffer, const geometry::VertexVector& vertices);
void setupIndices(gpu::BufferPointer& indexBuffer, const geometry::IndexVector& indices, const geometry::IndexVector& wireIndices);