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PodmogilnyjIvan
2021-12-03 03:34:31 -08:00
commit ff4acf84be
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225
Thirdparty/Pangolin/include/pangolin/gl/glvbo.h vendored Normal file
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/* This file is part of the Pangolin Project.
* http://github.com/stevenlovegrove/Pangolin
*
* Copyright (c) 2011 Steven Lovegrove
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#pragma once
#include <pangolin/gl/gl.h>
namespace pangolin
{
////////////////////////////////////////////////
// Interface
////////////////////////////////////////////////
void MakeTriangleStripIboForVbo(GlBuffer& ibo, int w, int h);
GlBuffer MakeTriangleStripIboForVbo(int w, int h);
void RenderVbo(GlBuffer& vbo, GLenum mode = GL_POINTS);
void RenderVboCbo(GlBuffer& vbo, GlBuffer& cbo, bool draw_color = true, GLenum mode = GL_POINTS);
void RenderVboIbo(GlBuffer& vbo, GlBuffer& ibo, bool draw_mesh = true);
void RenderVboIboCbo(GlBuffer& vbo, GlBuffer& ibo, GlBuffer& cbo, bool draw_mesh = true, bool draw_color = true);
void RenderVboIboNbo(GlBuffer& vbo, GlBuffer& ibo, GlBuffer& nbo, bool draw_mesh = true, bool draw_normals = true);
void RenderVboIboCboNbo(GlBuffer& vbo, GlBuffer& ibo, GlBuffer& cbo, GlBuffer& nbo, bool draw_mesh = true, bool draw_color = true, bool draw_normals = true);
////////////////////////////////////////////////
// Implementation
////////////////////////////////////////////////
inline void MakeTriangleStripIboForVbo(GlBuffer& ibo, int w, int h)
{
const int num_elements = w*(h-1)*2;
unsigned int* buffer = new unsigned int[num_elements];
unsigned int* ptr = buffer;
for(int y=0; y < (h-1);)
{
for(int x=0; x<w; ++x) {
(*ptr++) = y*w+x;
(*ptr++) = (y+1)*w+x;
}
++y;
if(y>=(h-1)) break;
for(int x=w-1; x>=0; --x) {
(*ptr++) = y*w+x;
(*ptr++) = (y+1)*w+x;
}
++y;
}
ibo.Reinitialise(GlElementArrayBuffer, num_elements, GL_UNSIGNED_INT, 1, GL_STATIC_DRAW );
ibo.Upload(buffer, sizeof(unsigned int)*num_elements );
delete[] buffer;
}
inline GlBuffer MakeTriangleStripIboForVbo(int w, int h)
{
GlBuffer ibo;
MakeTriangleStripIboForVbo(ibo,w,h);
return ibo;
}
inline void RenderVbo(GlBuffer& vbo, GLenum mode)
{
vbo.Bind();
glVertexPointer(vbo.count_per_element, vbo.datatype, 0, 0);
glEnableClientState(GL_VERTEX_ARRAY);
glDrawArrays(mode, 0, vbo.num_elements);
glDisableClientState(GL_VERTEX_ARRAY);
vbo.Unbind();
}
inline void RenderVboCbo(GlBuffer& vbo, GlBuffer& cbo, bool draw_color, GLenum mode )
{
if(draw_color) {
cbo.Bind();
glColorPointer(cbo.count_per_element, cbo.datatype, 0, 0);
glEnableClientState(GL_COLOR_ARRAY);
}
RenderVbo(vbo,mode);
if(draw_color) {
glDisableClientState(GL_COLOR_ARRAY);
cbo.Unbind();
}
}
inline void RenderVboIbo(GlBuffer& vbo, GlBuffer& ibo, bool draw_mesh)
{
vbo.Bind();
glVertexPointer(vbo.count_per_element, vbo.datatype, 0, 0);
glEnableClientState(GL_VERTEX_ARRAY);
if(draw_mesh) {
ibo.Bind();
glDrawElements(GL_TRIANGLE_STRIP,ibo.num_elements, ibo.datatype, 0);
ibo.Unbind();
}else{
glDrawArrays(GL_POINTS, 0, vbo.num_elements);
}
glDisableClientState(GL_VERTEX_ARRAY);
vbo.Unbind();
}
inline void RenderVboIboCbo(GlBuffer& vbo, GlBuffer& ibo, GlBuffer& cbo, bool draw_mesh, bool draw_color )
{
if(draw_color) {
cbo.Bind();
glColorPointer(cbo.count_per_element, cbo.datatype, 0, 0);
glEnableClientState(GL_COLOR_ARRAY);
}
RenderVboIbo(vbo,ibo,draw_mesh);
if(draw_color) {
glDisableClientState(GL_COLOR_ARRAY);
cbo.Unbind();
}
}
inline void RenderVboIboCboNbo(GlBuffer& vbo, GlBuffer& ibo, GlBuffer& cbo, GlBuffer& nbo, bool draw_mesh, bool draw_color, bool draw_normals)
{
if(draw_color) {
cbo.Bind();
glColorPointer(cbo.count_per_element, cbo.datatype, 0, 0);
glEnableClientState(GL_COLOR_ARRAY);
}
if(draw_normals) {
nbo.Bind();
glNormalPointer(nbo.datatype, (GLsizei)(nbo.count_per_element * GlDataTypeBytes(nbo.datatype)),0);
glEnableClientState(GL_NORMAL_ARRAY);
}
vbo.Bind();
glVertexPointer(vbo.count_per_element, vbo.datatype, 0, 0);
glEnableClientState(GL_VERTEX_ARRAY);
if(draw_mesh) {
ibo.Bind();
glDrawElements(GL_TRIANGLE_STRIP,ibo.num_elements, ibo.datatype, 0);
ibo.Unbind();
}else{
glDrawArrays(GL_POINTS, 0, vbo.num_elements);
}
if(draw_color) {
glDisableClientState(GL_COLOR_ARRAY);
cbo.Unbind();
}
if(draw_normals) {
glDisableClientState(GL_NORMAL_ARRAY);
nbo.Unbind();
}
glDisableClientState(GL_VERTEX_ARRAY);
vbo.Unbind();
}
inline void RenderVboIboNbo(GlBuffer& vbo, GlBuffer& ibo, GlBuffer& nbo, bool draw_mesh, bool draw_normals)
{
vbo.Bind();
glVertexPointer(vbo.count_per_element, vbo.datatype, 0, 0);
glEnableClientState(GL_VERTEX_ARRAY);
if(draw_normals) {
nbo.Bind();
glNormalPointer(nbo.datatype, (GLsizei)(nbo.count_per_element * GlDataTypeBytes(nbo.datatype)), 0);
glEnableClientState(GL_NORMAL_ARRAY);
}
if(draw_mesh) {
ibo.Bind();
glDrawElements(GL_TRIANGLE_STRIP,ibo.num_elements, ibo.datatype, 0);
ibo.Unbind();
}else{
glDrawArrays(GL_POINTS, 0, vbo.num_elements);
}
if(draw_normals) {
glDisableClientState(GL_NORMAL_ARRAY);
nbo.Unbind();
}
glDisableClientState(GL_VERTEX_ARRAY);
vbo.Unbind();
}
}