/* This function render sprites array into new opengl texture (or clear it).
* ahandle - pointer on opengl texture, if points to 0 new texture will be generated;
* width, height - width and height of new texture;
* sprites - array of sprites to draw;
* returns boolean
*/
bool TextureArray::drawToNewGLTexture( GLuint* ahandle, int width, int height, Sprite* sprites, unsigned int count )
{
GLuint FBOHandle;
GLuint VBOHandle;
// A FBO will be used to draw textures. FBO creation and setup.
if( !GLHelpers::CreateTexture( ahandle, width, height ) ||
!GLHelpers::BindTextureToFBO( *ahandle, FBOHandle ) ||
!GLHelpers::SetUpView( width, height, 1 ) )
return false;
VertexV2FT2FC4UI* vertices = (VertexV2FT2FC4UI*)malloc( (unsigned)sizeof(VertexV2FT2FC4UI) * count * 4 );
int vboc = 0;
VBOStructureHandle* vbostructure = prepareVBO( &vboc, sprites, count, vertices );
glGenBuffers(1, &VBOHandle);
GLHelpers::DrawVBO( VBOHandle, vboc, vbostructure, vertices );
glDeleteBuffers( 1, &VBOHandle );
free( vertices );
// Reset FBO
GLHelpers::ClearView( );
return GLHelpers::UnbindFBO( FBOHandle );
}
void VBOSphere::render() {
if (vertexVBO == -1) {
prepareVBO();
}
glPushMatrix();
setMatrix();
#ifdef OPENGL_ES1
glColor4f(objectColor.r, objectColor.g, objectColor.b, objectColor.a);
glDisableClientState(GL_COLOR_ARRAY);
#else
glDisableVertexAttribArray(shaderVertexColor);
glVertexAttrib4f(shaderVertexColor, objectColor.r, objectColor.g, objectColor.b, objectColor.a);
#endif
glBindBuffer(GL_ARRAY_BUFFER, vertexVBO);
#ifdef OPENGL_ES1
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, 0);
#else
glEnableVertexAttribArray(shaderVertexPosition);
glVertexAttribPointer(shaderVertexPosition, 3, GL_FLOAT, GL_FALSE, 0, 0);
#endif
glBindBuffer(GL_ARRAY_BUFFER, vertexNormalVBO);
#ifdef OPENGL_ES1
glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(GL_FLOAT, 0, 0);
#else
glEnableVertexAttribArray(shaderVertexNormal);
glVertexAttribPointer(shaderVertexNormal, 3, GL_FLOAT, GL_FALSE, 0, 0);
#endif
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, faceVBO);
glDrawElements(GL_TRIANGLES, faceCount * 3, GL_UNSIGNED_SHORT, 0);
#ifdef OPENGL_ES1
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
#endif
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glPopMatrix();
}
void Renderable::render() {
if (vertexVBO == -1) {
#ifdef OPENGL_ES1
#else
prepareVBO();
#endif
}
glPushMatrix();
setMatrix();
drawChildren();
if (vertexColors && colorBuffer != NULL) {
#ifdef OPENGL_ES1
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(4, GL_FLOAT, 0, colorBuffer);
#else
glEnableVertexAttribArray(shaderVertexColor);
glBindBuffer(GL_ARRAY_BUFFER, colorVBO);
glVertexAttribPointer(shaderVertexColor, 4, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
#endif
} else {
#ifdef OPENGL_ES1
glColor4f(objectColor.r, objectColor.g, objectColor.b, objectColor.a);
#else
glDisableVertexAttribArray(shaderVertexColor);
glVertexAttrib4f(shaderVertexColor, objectColor.r, objectColor.g, objectColor.b, objectColor.a);
#endif
}
if (nFaces > 0) {
#ifdef OPENGL_ES1
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, vertexBuffer);
#else
glEnableVertexAttribArray(shaderVertexPosition);
glBindBuffer(GL_ARRAY_BUFFER, vertexVBO);
glVertexAttribPointer(shaderVertexPosition, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
#endif
if (vertexNormalBuffer != NULL) {
#ifdef OPENGL_ES1
glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(GL_FLOAT, 0, vertexNormalBuffer);
#else
glBindBuffer(GL_ARRAY_BUFFER, vertexNormalVBO);
glEnableVertexAttribArray(shaderVertexNormal);
glVertexAttribPointer(shaderVertexNormal, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
#endif
}
#ifdef OPENGL_ES1
glDrawElements(GL_TRIANGLES, nFaces, GL_UNSIGNED_SHORT, faceBuffer);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
#else
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, faceVBO);
glDrawElements(GL_TRIANGLES, nFaces, GL_UNSIGNED_SHORT, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
#endif
}
if (vertexColors) {
#ifdef OPENGL_ES1
glDisableClientState(GL_COLOR_ARRAY);
#else
glDisableVertexAttribArray(shaderVertexColor);
#endif
}
glPopMatrix();
}
