SpatialFear.SFProceduralTexture

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//=============================================================================
// Spatial Fear
// Class: SFProceduralTexture
// Description: This class provides helper functionality to manage and render
// procederal textures
// !! Internal use only !!
//
// Author: Markus Nuebel
//=============================================================================

class SFProceduralTexture extends SFObject;

var SFArray	m_arTextures; // Private: Textues array
var int		m_nCurrentTex; // Private: Current texture to display
var int		m_nCount; // Private: Number of Textures in sequence
var int		m_X, m_Y; // Private: Screen dimensions
var int		m_XL, m_YL; // Private Screen offset
var int		m_UL, m_VL; // Private: Offset in texture
var float	m_U, m_V; // Private: Texture dimensions
var float	m_fSequenceTime; // Private: Time in msecs for whole sequence of m_nCount frames
var float	m_fTextureTime; // Private: Time in msecs for a single texture
var float	m_fCurrentTime; // Private: Single texute countdown timer;
var String	m_strPrefix; // Private: Texture prefix
var SFRenderStyle	m_Style; // Private: Render style used during drawing

// Initializes the class
function init(int nCount, String strPrefix, float fSequenceTime, SFRenderStyle RenderStyle, int XL, int YL, int X, int Y, int UL, int VL,  int U, int V)
{
	// Fill in members
	m_fSequenceTime	= fSequenceTime;
	m_nCount		= nCount;
	m_Style			= RenderStyle;
	m_strPrefix		= strPrefix;
	m_XL			= XL;
	m_YL			= YL;
	m_X				= X;
	m_Y				= Y;
	m_UL			= UL;
	m_VL			= VL;
	m_U				= U;
	m_V				= V;
	
	// Init custom arrray
	m_arTextures = Spawn(class'SFArray');
	m_arTextures.init(AT_Texture, nCount);

	// Load the animated texture
	class'SFUtils'.static.loadAnimatedTexture( m_arTextures, m_nCount, m_strPrefix);

	// Calc single texture time;
	m_fTextureTime	= m_fSequenceTime/nCount;

	// Some inits
	m_fCurrentTime	= m_fTextureTime; // Start countdown
	m_nCurrentTex	= 0;

	//class'SFUtils'.static.sfLogEx(10,"SFProceduralTexture - init: Prefix: " $ m_strPrefix $ " Count: " $ m_nCount $ " SequenceTime: " $ class'SFUtils'.static.FormatFloat(m_fSequenceTime) $ " TextureTime: " $ class'SFUtils'.static.FormatFloat(m_fTextureTime) $ " CurrentTime: " $ class'SFUtils'.static.FormatFloat(m_fCurrentTime));
}

// Cleanup stuff
function terminate()
{
	m_arTextures = None;
}

// Increments the texture sequence, thereby rolling over the number limit
function incSequence()
{
	m_nCurrentTex++;
	if(m_nCount <= m_nCurrentTex)
		m_nCurrentTex = 0;
}

// Decrements the texture sequence, thereby rolling over zero
function decSequence()
{
	m_nCurrentTex--;
	if(0 > m_nCurrentTex)
		m_nCurrentTex = m_nCount-1;
}

// Sets a new sequence time and updates the interal
// structures accordingly
function setSequenceTime(float fSequenceTime)
{
	local float	fOldTime;
	local float	fDiff;

	// Save old value
	fOldTime	= m_fTextureTime;

	// Update to new sequence time
	m_fSequenceTime	= fSequenceTime;

	// Calc single texture time;
	m_fTextureTime	= m_fSequenceTime/m_nCount;

	// Take current countdown into account
	fDiff			= fOldTime - m_fCurrentTime; // Already counted down
	m_fCurrentTime	= m_fTextureTime-fDiff;

	// Check if time is already up
	if(0 >= m_fCurrentTime) 
	{
		incSequence();	
		m_fCurrentTime = m_fTextureTime;
	}
}

// Should be called every tick to update the texture state.
function update(float fDeltaTime)
{
	// Decement countdown
	m_fCurrentTime -= fDeltaTime*1000;

	if(0 >= m_fCurrentTime) 
	{
		incSequence();	
		m_fCurrentTime = m_fTextureTime;
	}

	//class'SFUtils'.static.sfLogEx(5,"SFProceduralTexture - update: CurrentTime: " $ class'SFUtils'.static.FormatFloat(m_fCurrentTime) $ "DeltaTime" $ class'SFUtils'.static.FormatFloat(fDeltaTime) $ " TexIndex: " $ m_nCurrentTex);

}

// Renders the texture to the passed canvas at the passed position
function render(Canvas C, int XL, int YL, float fScale)
{
	C.Style = m_Style;
	// Set position
	C.SetPos(XL, YL);
	// Draw the texture
	C.DrawTile(m_arTextures.m_arTexture[m_nCurrentTex], m_X*fScale, m_Y*fScale, m_UL, m_VL, m_U, m_V);
}

defaultproperties
{
}

class file time: 12/7/2003 3:58:24 PM - creation time: 12/7/2003 4:03:45 PM
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