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BGE: Cleaning up the VBO code to use RAS_TexVert more directly instead of copying out pieces. This also gets rid of MapBuffers, which isn't available in OpenGL ES. Scenes that require constant VBO updates (like my skeletal mesh stress test) are now 10~13% faster.

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This commit is contained in:
Mitchell Stokes
2013-04-05 01:28:38 +00:00
parent 3ad13869fe
commit 6297eb7da7
2 changed files with 12 additions and 32 deletions
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39
source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_StorageVBO.cpp
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@@ -35,7 +35,7 @@ VBO::VBO(RAS_DisplayArray *data, unsigned int indices)
this->data = data;
this->size = data->m_vertex.size();
this->indices = indices;
this->stride = 32*sizeof(GLfloat); // ATI cards really like 32byte aligned VBOs, so we add a little padding
this->stride = sizeof(RAS_TexVert);
// Determine drawmode
if (data->m_type == data->QUAD)
@@ -54,11 +54,11 @@ VBO::VBO(RAS_DisplayArray *data, unsigned int indices)
UpdateData();
// Establish offsets
this->vertex_offset = 0;
this->normal_offset = (void*)(3*sizeof(GLfloat));
this->tangent_offset = (void*)(6*sizeof(GLfloat));
this->color_offset = (void*)(10*sizeof(GLfloat));
this->uv_offset = (void*)(11*sizeof(GLfloat));
this->vertex_offset = (void*)(((RAS_TexVert*)0)->getXYZ());
this->normal_offset = (void*)(((RAS_TexVert*)0)->getNormal());
this->tangent_offset = (void*)(((RAS_TexVert*)0)->getTangent());
this->color_offset = (void*)(((RAS_TexVert*)0)->getRGBA());;
this->uv_offset = (void*)(((RAS_TexVert*)0)->getUV(0));
}
VBO::~VBO()
@@ -69,36 +69,15 @@ VBO::~VBO()
void VBO::UpdateData()
{
unsigned int i, j, k;
glBindBufferARB(GL_ARRAY_BUFFER_ARB, this->vbo_id);
glBufferData(GL_ARRAY_BUFFER, this->stride*this->size, NULL, GL_STATIC_DRAW);
// Map the buffer
GLfloat *vbo_map = (GLfloat*)glMapBufferARB(GL_ARRAY_BUFFER_ARB, GL_WRITE_ONLY_ARB);
// Gather data
for (i = 0, j = 0; i < data->m_vertex.size(); i++, j += this->stride/sizeof(GLfloat))
{
memcpy(&vbo_map[j], data->m_vertex[i].getXYZ(), sizeof(float)*3);
memcpy(&vbo_map[j+3], data->m_vertex[i].getNormal(), sizeof(float)*3);
memcpy(&vbo_map[j+6], data->m_vertex[i].getTangent(), sizeof(float)*4);
memcpy(&vbo_map[j+10], data->m_vertex[i].getRGBA(), sizeof(char)*4);
for (k = 0; k < RAS_TexVert::MAX_UNIT; k++)
memcpy(&vbo_map[j+11+(k*2)], data->m_vertex[i].getUV(k), sizeof(float)*2);
}
glUnmapBufferARB(GL_ARRAY_BUFFER_ARB);
glBufferData(GL_ARRAY_BUFFER, this->stride*this->size, &this->data->m_vertex[0], GL_STATIC_DRAW);
}
void VBO::UpdateIndices()
{
int space = data->m_index.size() * sizeof(GLushort);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, this->ibo);
// Upload Data to VBO
glBufferData(GL_ELEMENT_ARRAY_BUFFER, space, &data->m_index[0], GL_STATIC_DRAW);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, data->m_index.size() * sizeof(GLushort),
&data->m_index[0], GL_STATIC_DRAW);
}
void VBO::Draw(int texco_num, RAS_IRasterizer::TexCoGen* texco, int attrib_num, RAS_IRasterizer::TexCoGen* attrib, int *attrib_layer, bool multi)

5
source/gameengine/Rasterizer/RAS_TexVert.h
View File

@@ -56,9 +56,10 @@ class RAS_TexVert
short m_softBodyIndex; //2
unsigned int m_unit; // 4
unsigned int m_origindex; // 4
char m_padding[8]; // 8
//---------
// 120
// 32 bytes total size, fits nice = 120 = not fit nice.
// 128
// 32 bytes alignment improves performance on ATI cards.
public:
enum {