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1

Texture maping problem with vertex buffer object

Started by newbiex11, Sep 14 2012 02:09 PM

OpenGL vbo

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#1 newbiex11 Members - Reputation: 104

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Posted 14 September 2012 - 02:09 PM

Hello friends.
I have a problem with texture mapping VBO.
did the mapping with blender and exported the information to a txt file then loaded into the software

texture mapping

blender render

my render

Code of load texture

[source lang="cpp"]image = SDL_LoadBMP(filename); if (image != NULL) { unsigned int size = sizeof(image->pixels); colorFormat = TEXTURE_RGB; dimension = TEXTURE_2D; glGenTextures(1,&name); glBindTexture (GL_TEXTURE_2D,name); // set pixel unpacking mode glPixelStorei (GL_UNPACK_SWAP_BYTES, 0); glPixelStorei (GL_UNPACK_ROW_LENGTH, 0); glPixelStorei (GL_UNPACK_ALIGNMENT, 1); glPixelStorei (GL_UNPACK_SKIP_ROWS, 0); glPixelStorei (GL_UNPACK_SKIP_PIXELS, 0); data = malloc(size); memcpy(&data,&image->pixels,size); glTexImage2D (GL_TEXTURE_2D, 0, 3, image->w, image->h, 0, GL_RGB, GL_UNSIGNED_BYTE, data); gluBuild2DMipmaps (GL_TEXTURE_2D, 3, image->w, image->h, GL_RGB, GL_UNSIGNED_BYTE, data); SDL_FreeSurface(image); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); //glGenerateMipmap(GL_TEXTURE_2D); glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); }}void TexturePCX::bind (){ glBindTexture(GL_TEXTURE_2D,name); glTexEnvi(GL_TEXTURE_ENV,GL_TEXTURE_ENV, GL_DECAL);}TexturePCX::~TexturePCX(){ free(data);//TODO : Liberar textura (OpenGL)}void TexturePCX::begin(){ glEnable(GL_TEXTURE); glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D,name); glTexEnvi(GL_TEXTURE_ENV,GL_TEXTURE_ENV, GL_DECAL);}void TexturePCX::end(){ glDisable(GL_TEXTURE); glDisable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D,0);}[/source]

Vertex Buffer Objects draw
[source lang="cpp"]void VertexBufferObject::setVertices(vec3d *data,unsigned int size){ glGenBuffers( 1, &vertexBuffId); glBindBuffer( GL_ARRAY_BUFFER, vertexBuffId ); vertices = data; glBufferDataARB( GL_ARRAY_BUFFER, size * 3 * sizeof(float), data, GL_STATIC_DRAW_ARB );}void VertexBufferObject::setIndexs(unsigned int *data,unsigned int size){ glGenBuffers( 1, &indexBuffId ); glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, indexBuffId ); indexs = data; numIndices = size; glBufferDataARB( GL_ELEMENT_ARRAY_BUFFER, size * sizeof(unsigned int), data, GL_STATIC_DRAW );}void VertexBufferObject::setNormals(float *data,unsigned int size){ glGenBuffers( 1, &normalBuffId ); glBindBuffer( GL_ARRAY_BUFFER, normalBuffId ); normals = data; glBufferDataARB( GL_ARRAY_BUFFER, size, data, GL_STATIC_DRAW_ARB );}void VertexBufferObject::setTexCoords(TexCoord2 *data,unsigned int size){ glGenBuffers( 1, &texBuffId ); glBindBuffer( GL_ARRAY_BUFFER, texBuffId ); texCoord = data; glBufferDataARB( GL_ARRAY_BUFFER, size * 2 * sizeof(float), data, GL_STATIC_DRAW_ARB );}void VertexBufferObject::draw(){ if (vertexBuffId != 0 ) { glEnableClientState(GL_VERTEX_ARRAY); glBindBuffer(GL_ARRAY_BUFFER, vertexBuffId); glVertexPointer(3,GL_FLOAT,0,0); } if (indexBuffId != 0 ) { glEnableClientState(GL_INDEX_ARRAY); glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffId); glIndexPointer(GL_UNSIGNED_INT,0,0);// glBufferData() } if (normalBuffId != 0) { glEnableClientState(GL_NORMAL_ARRAY); glNormalPointer(GL_FLOAT,0,normals); } if (texBuffId != 0) { glEnableClientState(GL_TEXTURE_COORD_ARRAY); glBindBuffer(GL_TEXTURE_COORD_ARRAY, texBuffId); glTexCoordPointer(3,GL_FLOAT,0,0); } glDrawElements(glMode,numIndices,GL_UNSIGNED_INT,0); glDisableClientState(GL_VERTEX_ARRAY); glDisableClientState(GL_INDEX_ARRAY); glDisableClientState(GL_NORMAL_ARRAY); glDisableClientState(GL_TEXTURE_COORD_ARRAY);}VertexBufferObject::~VertexBufferObject(){}[/source]

Cube information

Mesh: Cube.001
v: 1.000000 0.999999 1.000000
v: 1.000000 1.000000 -1.000000
v: -1.000000 1.000000 -1.000000
v: 1.000000 0.999999 1.000000
v: -1.000000 1.000000 -1.000000
v: -1.000000 1.000000 1.000000
v: -1.000000 -1.000000 -1.000000
v: -1.000000 -1.000000 1.000000
v: -1.000000 1.000000 1.000000
v: -1.000000 -1.000000 -1.000000
v: -1.000000 1.000000 1.000000
v: -1.000000 1.000000 -1.000000
v: 1.000000 -1.000000 -1.000000
v: 0.999999 -1.000001 1.000000
v: -1.000000 -1.000000 -1.000000
v: 0.999999 -1.000001 1.000000
v: -1.000000 -1.000000 1.000000
v: -1.000000 -1.000000 -1.000000
v: 1.000000 1.000000 -1.000000
v: 1.000000 0.999999 1.000000
v: 1.000000 -1.000000 -1.000000
v: 1.000000 0.999999 1.000000
v: 0.999999 -1.000001 1.000000
v: 1.000000 -1.000000 -1.000000
v: 1.000000 0.999999 1.000000
v: -1.000000 1.000000 1.000000
v: 0.999999 -1.000001 1.000000
v: -1.000000 1.000000 1.000000
v: -1.000000 -1.000000 1.000000
v: 0.999999 -1.000001 1.000000
v: 1.000000 1.000000 -1.000000
v: 1.000000 -1.000000 -1.000000
v: -1.000000 -1.000000 -1.000000
v: 1.000000 1.000000 -1.000000
v: -1.000000 -1.000000 -1.000000
v: -1.000000 1.000000 -1.000000
tex: h.bmp
t: 0.332314 0.000000
t: 0.333333 0.332314
t: 0.001020 0.333333
t: 0.332314 0.000000
t: 0.001020 0.333333
t: 0.000000 0.001020
t: 0.332314 0.333333
t: 0.333333 0.665647
t: 0.001020 0.666667
t: 0.332314 0.333333
t: 0.001020 0.666667
t: 0.000000 0.334353
t: 0.334353 0.333333
t: 0.333333 0.001020
t: 0.666667 0.332314
t: 0.333333 0.001020
t: 0.665647 0.000000
t: 0.666667 0.332314
t: 0.998981 0.000000
t: 1.000000 0.332314
t: 0.666667 0.001019
t: 1.000000 0.332314
t: 0.667686 0.333333
t: 0.666667 0.001019
t: 1.000000 0.334353
t: 0.998980 0.666667
t: 0.667686 0.333333
t: 0.998980 0.666667
t: 0.666667 0.665647
t: 0.667686 0.333333
t: 0.665647 0.333333
t: 0.666667 0.665647
t: 0.334353 0.666667
t: 0.665647 0.333333
t: 0.334353 0.666667
t: 0.333333 0.334353
End:

thanks for help.

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