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#include "Board.h"
#include "Graphics.h"
// See the Draw method for more information on using the Color class.
#include "Color.h"
// A generic X, Y point template. See Draw() below for usage info.
#include "Point.h"
// The SexyAppFramework resides in the "Sexy" namespace. As a convenience,
// you'll see in all the .cpp files "using namespace Sexy" to avoid
// having to prefix everything with Sexy::
using namespace Sexy;
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
Board::Board(GameApp* theApp)
{
mApp = theApp;
}
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
Board::~Board()
{
}
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
void Board::Update()
{
// Let the parent class update as well. This will increment
// the variable mUpdateCnt which is an integer that indicates
// how many times the Update() method has been called. Since our
// Board class is updated 100 times per second, this variable will
// increment 100 times per second. As you will see in later demos,
// we will use this variable for animation since its value represents
// hundredths of a second, which is for almost all games a good
// enough timer value and doesn't rely on the system clock function
// call.
Widget::Update();
// For this and most of the other demos, you will see the function
// below called every Update() call. MarkDirty() tells the widget
// manager that something has changed graphically in the widget and
// that it needs to be repainted. All widgets follow this convention.
// In general, if you don't need
// to update your drawing every time you call the Update method
// (the most common case is when the game is paused) you should
// NOT mark dirty. Why? If you aren't marking dirty every frame,
// then you aren't drawing every frame and thus you use less CPU
// time. Because people like to multitask, or they may be on a laptop
// with limited battery life, using less CPU time lets people do
// other things besides play your game. Of course, everyone
// will want to play your game at all times, but it's good to be
// nice to those rare people that might want to read email or
// do other things at the same time.
// In this particular demo, we
// won't be nice, as the purpose is to bring you up to speed as
// quickly as possible, and so we'll dispense with optimizations
// for now, so you can concentrate on other core issues first.
// In general, this is the last method called in the Update
// function, but that is not necessary. In fact, the MarkDirty
// function can be called anywhere, in any method (although
// calling it in the Draw method doesn't make sense since it is
// already drawing) and even multiple times. Calling it multiple
// times does not do anything: only the first call makes a difference.
MarkDirty();
}
//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
void Board::Draw(Graphics* g)
{
// And now for the good stuff! The Graphics object, "g", is
// automatically created and passed to this method by the
// WidgetManager and can be thought of as the main screen
// bitmap/canvas upon which all drawing will be done. This object
// is double buffered automatically so you don't need to worry
// about those details. All you need to do is instruct the object
// that you would like to draw something to it, and when the
// WidgetManager gets done letting all widgets draw to the
// Graphics object, it will then blit everything to the screen
// at once.
// First, let's start by drawing some geometric primitives. By
// default, the drawing color is black. We will change it later
// on. The first command clears the screen by drawing a
// black rectangle (black due to the default color) that is
// located at coordinate 0, 0 and is the same size as our
// Board widget, which is the same size as the application and
// thus is the same size of the game window.
g->FillRect(0, 0, mWidth, mHeight);
// You may notice that there's another form of FillRect, one that
// takes a Rect object as its sole parameter. That does the
// same thing as the above function, but sometimes its more useful
// to draw using a Rect object.
// Now let's learn how to change the color of the shapes we're drawing.
// Call the "SetColor" method to change the current drawing color.
// The parameter is a Color object which can take 3 or 4 parameters.
// If you call it with only 3 parameters, the 4th one, which is the
// alpha value, is set to 255 for fully opaque. The first three are
// in order, red, green, and blue. They range from 0 to 255.
g->SetColor(Color(255, 128, 64)); // some ugly orangish color
// Let's draw a smaller rectangle with its upper left corner
// in the center of the screen.
g->FillRect(mWidth / 2, mHeight / 2, 50, 50);
// Now let's continue with some other primitives. How about
// drawing a few lines? We'll use a few other colors too.
g->SetColor(Color(255, 0, 0)); // red
// Parameter order is X1, Y1, X2, Y2
g->DrawLine(0, 0, 200, 150);
g->SetColor(Color(0, 255, 0)); // green
g->DrawLine(mWidth, 0, mWidth - 200, 150);
g->SetColor(Color(0, 0, 255)); // blue
g->DrawLine(0, mHeight, 200, mHeight - 150);
g->SetColor(Color(255, 255, 255)); // white
g->DrawLine(mWidth, mHeight, mWidth - 200, mHeight - 150);
// Let's draw another rectangle, with vertices where each of
// the previous 4 lines were. This time, however, let's not
// fill it in and just draw its outline instead. We
// accomplish that with the DrawRect function, which doesn't
// fill in the center.
g->SetColor(Color(255, 0, 255)); // purple
g->DrawRect(200, 150, (mWidth - 200) - 200, (mHeight - 150) - 150);
// Tired of drawing lines and quads? How about drawing a triangle
// instad? To do that, we use the generic PolyFill function which
// draws a closed polygon with any number of points, >= 2.
// We pass this function an array containing these points. We'll
// create such an array right now, although in reality you'd
// probably make this a constant instead of creating it every time.
// We'll make use of the Point template which will use the int type
// to specify the X, Y coordinates of each point in our triangle.
// It is assumed that the last point connects to the first point.
Point trianglePoints[3];
trianglePoints[0] = Point(30, 30);
trianglePoints[1] = Point(30, 60);
trianglePoints[2] = Point(60, 45);
g->SetColor(Color(255, 255, 0)); // yellow
g->PolyFill(trianglePoints, 3);
// And how about a pentagram as well?
g->SetColor(Color(0, 255, 255)); // cyan
Point pentaPoints[5];
pentaPoints[0] = Point(200, 0);
pentaPoints[1] = Point(150, 40);
pentaPoints[2] = Point(150, 80);
pentaPoints[3] = Point(250, 80);
pentaPoints[4] = Point(250, 40);
g->PolyFill(pentaPoints, 5);
}
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