void OGLText::PrintString(const Camera &camera, const Vector3f &position, float scale, const char* string) const
{
//apply texture
_pTexture->ApplyTexture(0);
//initalize matrices
_positionTransform[12] = position.getX();
_positionTransform[13] = position.getY();
_positionTransform[14] = position.getZ();
_positionTransform[0] = scale;
_positionTransform[5] = scale;
_positionTransform[10] = scale;
//initalize shader variables
int shaderID = ShaderManager::GetManager()->GetActiveShaderID();
int texMatLoc = ShaderManager::GetManager()->GetVariableLocation(shaderID, "textureMat");
camera.ApplyCameraMatricesToActiveShader(_positionTransform);
//bind array and index buffers
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(4);
glBindBuffer(GL_ARRAY_BUFFER, _vertexBufferID);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _indicesBufferID);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
glVertexAttribPointer(4, 2, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(48));
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
for (int i = 0; i < strlen(string); i++)
{
char character = string[i] - 32;
float texX = (static_cast<float>(character % 16)) / 16.f;
float texY = (static_cast<float>(character / 16)) / 16.f + 0.0625f;
_textureTransform[6] = texX;
_textureTransform[7] = texY;
_positionTransform[12] += scale*2;
camera.ApplyCameraMatricesToActiveShader(_positionTransform);
ShaderManager::GetManager()->SetVariable(texMatLoc, _textureTransform);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_BYTE, BUFFER_OFFSET(0));
}
glDisable(GL_BLEND);
glDisableVertexAttribArray(0);
glDisableVertexAttribArray(4);
}
