[NormalMap] Restore Z from X and Y

[xrModder]

Plugin to restore Z from X and Y.

 

Spoiler

// Name:		xy2xyz
// Submenu:		
// Author:		iOrange & xrModder
// Title:		xy2xyz
// Version:		0.1
// Desc:		Restore Z from X and Y
// Keywords:	
// URL:			
// Help:		

float Clamp(float v, float a, float b)
{
	return Math.Min(b, Math.Max(a, v));
}

void Render(Surface dst, Surface src, Rectangle rect)
{
	ColorBgra srcPixel, dstPixel = new ColorBgra();

	// Fill alpha channel with white
	dstPixel.A = 255;

	for (int y = rect.Top; y < rect.Bottom; ++y)
	{
		if (IsCancelRequested) return;

		for (int x = rect.Left; x < rect.Right; ++x)
		{
			srcPixel = src[x, y];

			// Convert R and G channel (0...255) to X and Y (-1...+1)
			float nx = (float)srcPixel.R / 127.5f - 1.0f;
			float ny = (float)srcPixel.G / 127.5f - 1.0f;

			// Calculate Z
			float nz = (float)Math.Sqrt(Clamp(1.0f - (nx * nx + ny * ny), 0.0f, 1.0f));

			// Keep R and G channel unchanged
			dstPixel.R = srcPixel.R;
			dstPixel.G = srcPixel.G;

			// Convert Z (0...1) to B channel (0...255)
			dstPixel.B = (byte)Clamp(nz * 127.5f + 127.5f, 0.0f, 255.0f);

			dst[x, y] = dstPixel;
		}
	}
}

 

 

To install, copy xy2xyz.dll to the Effects folder.

xy2xyz.dll

 

Edited November 19, 2021 by xrModder
Putting things in order

[ReMake]

Show us the result of the plugin (the original image, the image with Normal Map and image after applying your effect).

[xrModder]

18 minutes ago, ReMake said:

Show us the result of the plugin (the original image, the image with Normal Map and image after applying your effect).

 

 

Edited November 24, 2020 by xrModder

[Ego Eram Reputo]

Hello @xrModder - congratulations on this plugin!

 

Can I suggest you change the location of it to Effects > Height Map? There are several tools which use this submenu, and I think yours will be a good fit.

[xrModder]

[RUS] Можно восстановить любой NormalMap, если в текстуре есть X и Y. К примеру X в NormalMap игры Survarium находится в альфа канале (так как при сжатии DXT5 (BC3) в зелёном канале практический нет потерь, а альфа канал остается без изменении).

 

[ENG] You can restore any NormalMap, if the texture contains X and Y. For example, X in the NormalMap of Survarium is in the alpha channel (since with DXT5 (BC3) compression in the green channel there is practically no loss, and the alpha channel remains unchanged).

 

Пример кода / Sample code:

 

			...

			float nx = (float)srcPixel.A / 127.5f - 1.0f;
			float ny = (float)srcPixel.G / 127.5f - 1.0f;

			float nz = (float)Math.Sqrt(Clamp(1.0f - (nx * nx + ny * ny), 0.0f, 1.0f));

			dstPixel.R = srcPixel.A;
			dstPixel.G = srcPixel.G;

			dstPixel.B = (byte)Clamp(nz * 127.5f + 127.5f, 0.0f, 255.0f);

			...

 

Edited November 26, 2020 by xrModder
+ English text

[Ego Eram Reputo]

In English please @xrModder. It is acceptable to post a Google Translation

 

[xrModder]

1 hour ago, Ego Eram Reputo said:

In English please @xrModder. It is acceptable to post a Google Translation

 

Added.

[xrModder]

Plugin update (v0.2):

• added help;
• ability to invert the X and Y axes.

Spoiler

// Name:		xy2xyz
// Submenu:		Advanced
// Author:		iOrange & xrModder
// Title:		xy2xyz
// Version:		0.2
// Desc:		Restore Z from X and Y (convert XY Normal Map to XYZ Normal Map)
// Keywords:	Normal Map
// URL:			https://forums.getpaint.net/profile/161661-xrmodder/
// Help:		The plugin restores the Z axis of the Normal Map from the existing X and Y axes. By default, in the original image, the X and Y axis are respectively in the R and G channels.

#region UICode
CheckboxControl InvertXAxis = false; // Invert X axis
CheckboxControl InvertYAxis = false; // Invert Y axis
#endregion

float Clamp(float v, float a, float b)
{
	return Math.Min(b, Math.Max(a, v));
}

void Render(Surface dst, Surface src, Rectangle rect)
{
	ColorBgra srcPixel, dstPixel = new ColorBgra();

	// Fill alpha channel with white
	dstPixel.A = 255;

	for (int y = rect.Top; y < rect.Bottom; ++y)
	{
		if (IsCancelRequested) return;

		for (int x = rect.Left; x < rect.Right; ++x)
		{
			srcPixel = src[x, y];

			// Invert X axis
			if (InvertXAxis)
			{
				srcPixel.R = (byte)(255 - srcPixel.R);
			}

			// Invert Y axis
			if (InvertYAxis)
			{
				srcPixel.G = (byte)(255 - srcPixel.G);
			}

			// Convert R and G channel (0...255) to X and Y (-1...+1)
			float nx = (float)srcPixel.R / 127.5f - 1.0f;
			float ny = (float)srcPixel.G / 127.5f - 1.0f;

			// Calculate Z
			float nz = (float)Math.Sqrt(Clamp(1.0f - (nx * nx + ny * ny), 0.0f, 1.0f));

			// Keep R and G channel unchanged
			dstPixel.R = srcPixel.R;
			dstPixel.G = srcPixel.G;

			// Convert Z (0...1) to B channel (0...255)
			dstPixel.B = (byte)Clamp(nz * 127.5f + 127.5f, 0.0f, 255.0f);

			dst[x, y] = dstPixel;
		}
	}
}

 

 

To install, copy xy2xyz.dll to the Effects folder.

xy2xyz.dll

Edited November 23, 2021 by xrModder
Putting things in order

[xrModder]

Plugin update (v0.3):

• choice of channel X and Y.

Spoiler

// Name:		xy2xyz
// Submenu:		Advanced
// Author:		iOrange & xrModder
// Title:		xy2xyz
// Version:		0.3
// Desc:		Restore Z from X and Y (convert XY Normal Map to XYZ Normal Map)
// Keywords:	Normal Map
// URL:			https://forums.getpaint.net/profile/161661-xrmodder/
// Help:		The plugin restores the Z axis of the Normal Map from the existing X and Y axes. By default, in the original image, the X and Y axis are respectively in the R and G channels.

#region UICode
RadioButtonControl XAxisChannel = 0; // X axis channel|Red|Green|Blue|Alpha
RadioButtonControl YAxisChannel = 1; // Y axis channel|Red|Green|Blue|Alpha
CheckboxControl InvertXAxis = false; // Invert X axis
CheckboxControl InvertYAxis = false; // Invert Y axis
#endregion

float Clamp(float v, float a, float b)
{
	return Math.Min(b, Math.Max(a, v));
}

void Render(Surface dst, Surface src, Rectangle rect)
{
	ColorBgra srcPixel, dstPixel = new ColorBgra();

	// Fill alpha channel with white
	dstPixel.A = 255;

	for (int y = rect.Top; y < rect.Bottom; ++y)
	{
		if (IsCancelRequested) return;

		for (int x = rect.Left; x < rect.Right; ++x)
		{
			srcPixel = src[x, y];

			// X axis channel switch
			switch(XAxisChannel)
			{
				case 0:
					srcPixel.R = srcPixel.R;
					break;
				case 1:
					srcPixel.R = srcPixel.G;
					break;
				case 2:
					srcPixel.R = srcPixel.B;
					break;
				case 3:
					srcPixel.R = srcPixel.A;
					break;
			}

			// Y axis channel switch
			switch(YAxisChannel)
			{
				case 0:
					srcPixel.G = srcPixel.R;
					break;
				case 1:
					srcPixel.G = srcPixel.G;
					break;
				case 2:
					srcPixel.G = srcPixel.B;
					break;
				case 3:
					srcPixel.G = srcPixel.A;
					break;
			}

			// Invert X axis
			if (InvertXAxis)
			{
				srcPixel.R = (byte)(255 - srcPixel.R);
			}

			// Invert Y axis
			if (InvertYAxis)
			{
				srcPixel.G = (byte)(255 - srcPixel.G);
			}

			// Convert R and G channel (0...255) to X and Y (-1...+1)
			float nx = (float)srcPixel.R / 127.5f - 1.0f;
			float ny = (float)srcPixel.G / 127.5f - 1.0f;

			// Calculate Z
			float nz = (float)Math.Sqrt(Clamp(1.0f - (nx * nx + ny * ny), 0.0f, 1.0f));

			// Keep R and G channel unchanged
			dstPixel.R = srcPixel.R;
			dstPixel.G = srcPixel.G;

			// Convert Z (0...1) to B channel (0...255)
			dstPixel.B = (byte)Clamp(nz * 127.5f + 127.5f, 0.0f, 255.0f);

			dst[x, y] = dstPixel;
		}
	}
}

 

To install, copy xy2xyz.dll to the Effects folder.

xy2xyz.dll

[xrModder]

Plugin update (v0.4):

• code fix.

Spoiler

// Name:		xy2xyz
// Submenu:		
// Author:		iOrange & xrModder
// Title:		xy2xyz
// Version:		0.4
// Desc:		Restore Z from X and Y (convert XY Normal Map to XYZ Normal Map)
// Keywords:	Normal Map
// URL:			https://forums.getpaint.net/profile/161661-xrmodder/
// Help:		The plugin restores the Z axis of the Normal Map from the existing X and Y axes.

#region UICode
ListBoxControl		XAxisChannel	= 0;		// X axis channel|Red|Green|Blue|Alpha
ListBoxControl		YAxisChannel	= 1;		// Y axis channel|Red|Green|Blue|Alpha
CheckboxControl		FlipXAxis		= false;	// Flip X axis
CheckboxControl		FlipYAxis		= false;	// Flip Y axis
#endregion

float Clamp(float v, float a, float b)
{
	return Math.Min(Math.Max(a, v), b);
}

void Render(Surface dst, Surface src, Rectangle rect)
{
	ColorBgra srcPixel, dstPixel = new ColorBgra();

	// Fill alpha channel with white
	dstPixel.A = 255;

	for (int y = rect.Top; y < rect.Bottom; y++)
	{
		if (IsCancelRequested) return;

		for (int x = rect.Left; x < rect.Right; x++)
		{
			srcPixel = src[x, y];

			// X axis channel switch
			switch (XAxisChannel)
			{
				case 0: srcPixel.R = srcPixel.R; break;
				case 1: srcPixel.R = srcPixel.G; break;
				case 2: srcPixel.R = srcPixel.B; break;
				case 3: srcPixel.R = srcPixel.A; break;
			}

			// Y axis channel switch
			switch (YAxisChannel)
			{
				case 0: srcPixel.G = srcPixel.R; break;
				case 1: srcPixel.G = srcPixel.G; break;
				case 2: srcPixel.G = srcPixel.B; break;
				case 3: srcPixel.G = srcPixel.A; break;
			}

			// Flip X axis
			if (FlipXAxis) srcPixel.R = (byte)(255 - srcPixel.R);

			// Flip Y axis
			if (FlipYAxis) srcPixel.G = (byte)(255 - srcPixel.G);

			// Convert R and G channel (0...255) to X and Y (-1...1)
			float nx = (float)srcPixel.R / 127.5f - 1.0f;
			float ny = (float)srcPixel.G / 127.5f - 1.0f;

			// Calculate Z
			float nz = (float)Math.Sqrt(Clamp(1.0f - (nx * nx + ny * ny), 0.0f, 1.0f));

			// Keep R and G channel unchanged
			dstPixel.R = srcPixel.R;
			dstPixel.G = srcPixel.G;

			// Convert Z (0...1) to B channel (0...255)
			dstPixel.B = (byte)Clamp(nz * 127.0f + 128.0f, 0.0f, 255.0f);

			dst[x, y] = dstPixel;
		}
	}
}

 

To install, copy xy2xyz.dll to the Effects folder.

xy2xyz.dll

Edited March 22 by xrModder

[Kokonut]

This is awesome! I used to have to do these kind of things manually, and the option to pick what channels to use from the source image are very useful for nonstandard normalmap formats.

 

It'd be nice if there was also an option to copy an existing Z channel from a layer rather than generate it, this would make this also a useful tool for converting normalmaps between different engines (since they often have different/inverted channels) while keeping Z 1:1 the same, and options to pick which channels to use for the output, although that might be better suited as its own tool.

[xrModder]

Plugin update (v0.5):

• code fix.

Spoiler

// Name:		xy2xyz
// Submenu:		
// Author:		iOrange & xrModder
// Title:		xy2xyz
// Version:		0.5
// Desc:		Restore Z from X and Y (convert XY Normal Map to XYZ Normal Map)
// Keywords:	Normal Map
// URL:			https://forums.getpaint.net/profile/161661-xrmodder/
// Help:		The plugin restores the Z axis of the Normal Map from the existing X and Y axes.

#region UICode
ListBoxControl		XAxisChannel	= 0;		// X axis channel|Red|Green|Blue|Alpha
ListBoxControl		YAxisChannel	= 1;		// Y axis channel|Red|Green|Blue|Alpha
CheckboxControl		FlipXAxis		= false;	// Flip X axis
CheckboxControl		FlipYAxis		= false;	// Flip Y axis
#endregion

float Clamp(float v, float a, float b)
{
	return Math.Min(Math.Max(a, v), b);
}

void Render(Surface dst, Surface src, Rectangle rect)
{
	ColorBgra srcPixel, dstPixel = new ColorBgra();

	// Fill alpha channel with white
	dstPixel.A = 255;

	for (int y = rect.Top; y < rect.Bottom; y++)
	{
		if (IsCancelRequested) return;

		for (int x = rect.Left; x < rect.Right; x++)
		{
			srcPixel = src[x, y];

			// X axis channel switch
			switch (XAxisChannel)
			{
				case 0: dstPixel.R = srcPixel.R; break;
				case 1: dstPixel.R = srcPixel.G; break;
				case 2: dstPixel.R = srcPixel.B; break;
				case 3: dstPixel.R = srcPixel.A; break;
			}

			// Y axis channel switch
			switch (YAxisChannel)
			{
				case 0: dstPixel.G = srcPixel.R; break;
				case 1: dstPixel.G = srcPixel.G; break;
				case 2: dstPixel.G = srcPixel.B; break;
				case 3: dstPixel.G = srcPixel.A; break;
			}

			// Flip X axis
			if (FlipXAxis) dstPixel.R = (byte)(255 - dstPixel.R);

			// Flip Y axis
			if (FlipYAxis) dstPixel.G = (byte)(255 - dstPixel.G);

			// Convert R and G channel (0...255) to X and Y (-1...1)
			float nx = (float)dstPixel.R / 127.5f - 1.0f;
			float ny = (float)dstPixel.G / 127.5f - 1.0f;

			// Calculate Z
			float nz = (float)Math.Sqrt(Clamp(1.0f - (nx * nx + ny * ny), 0.0f, 1.0f));

			// Convert Z (0...1) to B channel (0...255)
			dstPixel.B = (byte)Clamp(nz * 127.0f + 128.0f, 0.0f, 255.0f);

			dst[x, y] = dstPixel;
		}
	}
}

 

To install, copy xy2xyz.dll to the Effects folder.

xy2xyz.dll