This is an example of how to draw a simple triangle using DirectX:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
namespace DirectXHelloWorld
{
public partial class DirectXHelloWorld : Form
{
//Define device to write to.
Device device = null;
// Define a vertexBuffer to store the 3d objects.
VertexBuffer vertexBuffer = null;
//Main method.
static void Main()
{
// Instantiate form, initialize graphics and show the form.
DirectXHelloWorld form = new DirectXHelloWorld();
form.InitializeGraphics();
form.Show();
// Render loop
while (form.Created)
{
form.render();
Application.DoEvents();
}
}
// Called to draw screen.
public void render()
{
//Clear the backbuffer to a blue color (ARGB = 000000ff)
device.Clear(ClearFlags.Target, System.Drawing.Color.Black, 1.0f, 0);
device.BeginScene();
device.SetStreamSource(0, vertexBuffer, 0);
device.VertexFormat = CustomVertex.TransformedColored.Format;
device.DrawPrimitives(PrimitiveType.TriangleList, 0, 1);
//End the scene
device.EndScene();
device.Present();
}
// Initalize the graphics system.
public void InitializeGraphics()
{
try
{
PresentParameters presentParams = new PresentParameters();
presentParams.Windowed = true;
presentParams.SwapEffect = SwapEffect.Discard;
// On my chepo laptop I don't have hardward support so I'm
// using SoftwareVertexProcessing. If you have a real graphics
// card you should change this to HardwareVertexProcessing.
device = new Device(0,
DeviceType.Hardware,
this,
CreateFlags.SoftwareVertexProcessing,
presentParams);
device.DeviceReset+=
new System.EventHandler(this.OnResetDevice);
OnResetDevice(device, null);
}
catch (DirectXException e)
{
MessageBox.Show(null, "Error intializing graphics: " + e.Message, "Error");
Close();
}
}
public void OnResetDevice(object sender, EventArgs e)
{
Device dev = (Device)sender;
vertexBuffer = new VertexBuffer(typeof(CustomVertex.TransformedColored),3, dev,
0,
CustomVertex.TransformedColored.Format,
Pool.Default);
GraphicsStream stm = vertexBuffer.Lock(0, 0, 0);
CustomVertex.TransformedColored[] verts = new CustomVertex.TransformedColored[3];
verts[0].X = 150;
verts[0].Y = 50;
verts[0].Z = 0.5f;
verts[0].Rhw = 1;
verts[0].Color = System.Drawing.Color.Red.ToArgb();
verts[1].X = 250;
verts[1].Y = 250;
verts[1].Z = 0.5f;
verts[1].Rhw = 1;
verts[1].Color = System.Drawing.Color.Green.ToArgb();
verts[2].X = 50;
verts[2].Y = 250;
verts[2].Z = 0.5f;
verts[2].Rhw = 1;
verts[2].Color = System.Drawing.Color.Blue.ToArgb();
stm.Write(verts);
vertexBuffer.Unlock();
}
}
}
For more information on DirectX with c# I recommend the following book: <a href=”http://www.amazon.com/gp/product/1568812361?ie=UTF8&tag=develoresour-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=1568812361″>C# and Game Programming: A Beginner’s Guide, Second Edition (Book & CD-ROM)</a><img src=”http://www.assoc-amazon.com/e/ir?t=develoresour-20&l=as2&o=1&a=1568812361″ width=”1″ height=”1″ border=”0″ alt=”" style=”border:none !important; margin:0px !important;” />
Here is how you can access mysql using python:
#!/usr/bin/python
import MySQLdb
import sys
import time
db = MySQLdb.connect(host="reportsdb",user="root", db="tool_metrics")
dbc = db.cursor()
str = "select '1','2','3'";
dbc.execute(str)
records = dbc.fetchall()
for r in records:
print r[0]+","+r[1]+","+r[2]
For more information on Python and databases I recommend the following book for futher reading: <a href=”http://www.amazon.com/gp/product/0596009402?ie=UTF8&tag=develoresour-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=0596009402″>Python Pocket Reference (Pocket Reference (O’Reilly))</a><img src=”http://www.assoc-amazon.com/e/ir?t=develoresour-20&l=as2&o=1&a=0596009402″ width=”1″ height=”1″ border=”0″ alt=”" style=”border:none !important; margin:0px !important;” />
Step 1: Install mysql driver for ruby.
You can download package from here
Execute: ruby extconf.rb –with-mysql-config
Then make;make install
Step 2: Write simple ruby client.
require "mysql"
my = Mysql.connect("localhost", "", "", "test")
puts my
res = my.query("select * from tblMovies")
res.each do |row|
puts row[0]+row[1]
end
That’s it! Now you can access a database with Ruby.
While trying to install mysql dbd module for ruby I encountered the following error:
/usr/local/ruby/lib/ruby/site_ruby/1.8/i686-linux/mysql.so: /usr/local/ruby/lib/ ruby/site_ruby/1.8/i686-linux/mysql.so: undefined symbol: __pure_virtual - /usr/ local/ruby/lib/ruby/site_ruby/1.8/i686-linux/mysql.so (LoadError) from ruby-db-client.rb:4
After some googling I found this is a problem with mysql 5.0.22. I was able to fix it by modyfing /usr/local/mysql/bin/mysql_config and adding -lgcc to the libs argument.
After reinstalling ruby everything worked fine.
You can call a webservice from VBA simply by posting the soap envelope. Here is an example:
Dim http As New WinHttp.WinHttpRequest
Dim URL As String
Dim envelope As String
URL = "http://notificationserver/NotificationServer/NotifyService"
envelope = "<?xml version=""1.0"" encoding=""UTF-8""?><soap:Envelope soap:encodingStyle=""http://schemas.xmlsoap.org/soap/encoding/"" xmlns:soap=""http://schemas.xmlsoap.org/soap/envelope/"" xmlns:soapenc=""http://schemas.xmlsoap.org/soap/encoding/"" xmlns:xsi=""http://www.w3.org/2001/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" xmlns:tns=""http://NotificationServer.nvidia.com/""><soap:Body><tns:notify><id xsi:type=""xsd:string"">blah</id><from xsi:type=""xsd:string"">from </from><subject xsi:type=""xsd:string"">subject</subject><details xsi:type=""xsd:string"">details</details></tns:notify></soap:Body></soap:Envelope>"
Call http.Open("POST", URL)
http.SetRequestHeader "Content-Type", "text/xml"
http.SetRequestHeader "SOAPAction", " "
http.Send envelope
MsgBox http.ResponseText
I ran into this problem today with mysql. Took me a while to figure out that it was caused by my /tmp drive being full.
Clearing the /tmp drive solved the issue.
To trim a string in C++ you should use the Boost library. Writing C++ without Boost is no fun. Boost provides great libraries for almost any c++ work and its a proving ground for future revisions of the c++ standard library.
So how do you trim a string in c++ using boost?
#include <iostream>
#include <boost/algorithm/string/trim.hpp>
int main(int argc, char * argv[]) {
cout << trim(argv[1]);
}
For more information about boost I recommend this book: Beyond the C++ Standard Library: An Introduction to Boost
Here is an example of how to connect to a MysqlDB using python.
#!/usr/bin/python
import MySQLdb
import sys
class Table:
def __init__(self, db, name):
self.db = db
self.name = name
self.dbc = self.db.cursor()
def execute(self):
query = "select 1,2 from you_table "
self.dbc.execute(query)
return self.dbc.fetchall()
def next(self):
return self.dbc.fetchone()
db = MySQLdb.connect(host="<your host>",user="<your username>", db="<your db>", passwd=<your passwd>)
event_table = Table(db, "event_table")
records = event_table.execute()
for r in records:
print str(r[0])+","+str(r[1])
Here is an example of how to call a web service using Ruby. This example requires no external libraries, everything is built into the language. However it does require version 1.8.5 early version don’t have the create_rpc_driver method.
#Requires Ruby version 1.8.5 or highet
require 'soap/wsdlDriver'
require 'pp'
wsdl = 'http://webservices.daehosting.com/services/isbnservice.wso?WSDL'
driver = SOAP::WSDLDriverFactory.new(wsdl).create_rpc_driver
# Log SOAP request and response
driver.wiredump_file_base = "soap-log.txt"
response = driver.IsValidISBN13(:sISBN => '0000000000000')
#pp(response)
puts response.isValidISBN13Result
For more information about Ruby and Web Services I recommend Ruby Cookbook (Cookbooks (O’Reilly))
.
This post is an example Java Soap client call using the apache axis library.
First you need to download axis from ws.apache.org. This library provides tools to convert a wsdl into a Java stub class that you can then use.
Once you’ve extracted the axis directory run the following command on the wsdl that you want to consume.
java -cp axis-1_4/lib/wsdl4j-1.5.1.jar:axis-1_4/lib/saaj.jar:axis-1_4/lib/jaxrpc.jar:axis-1_4/lib/axis.jar:axis-1_4/lib/commons-logging-1.0.4.jar:axis-1_4/lib/commons-discovery-0.2.jar:. org.apache.axis.wsdl.WSDL2Java http://webservices.daehosting.com/services/isbnservice.wso?WSDL
If you have your classpath set up you probably don’t need as much but for simplicity I included all the jars in the axis distribution.
Now you can use the stubs that were generated
import com.daehosting.webservices.ISBN.*;
class client {
public static void main(String argv[]) throws Exception {
ISBNServiceSoapType service = new ISBNServiceLocator().getISBNServiceSoap();
System.out.println(service.isValidISBN13("0000000000000"));
}
}
For further reading I recommend the following book Java Web Services
.
