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package com.jme3.scene.plugins.blender.textures.blending;
import com.jme3.math.FastMath;
import com.jme3.scene.plugins.blender.BlenderContext;
import com.jme3.scene.plugins.blender.materials.MaterialHelper;
/**
* An abstract class that contains the basic methods used by the classes that
* will derive from it.
*
* @author Marcin Roguski (Kaelthas)
*/
/* package */abstract class AbstractTextureBlender implements TextureBlender {
/**
* This method blends the single pixel depending on the blending type.
*
* @param result
* the result pixel
* @param materialColor
* the material color
* @param pixelColor
* the pixel color
* @param blendFactor
* the blending factor
* @param blendtype
* the blending type
* @param blenderContext
* the blender context
*/
protected void blendPixel(float[] result, float[] materialColor, float[] pixelColor, float blendFactor, int blendtype, BlenderContext blenderContext) {
float oneMinusFactor = 1.0f - blendFactor, col;
switch (blendtype) {
case MTEX_BLEND:
result[0] = blendFactor * pixelColor[0] + oneMinusFactor * materialColor[0];
result[1] = blendFactor * pixelColor[1] + oneMinusFactor * materialColor[1];
result[2] = blendFactor * pixelColor[2] + oneMinusFactor * materialColor[2];
break;
case MTEX_MUL:
result[0] = (oneMinusFactor + blendFactor * materialColor[0]) * pixelColor[0];
result[1] = (oneMinusFactor + blendFactor * materialColor[1]) * pixelColor[1];
result[2] = (oneMinusFactor + blendFactor * materialColor[2]) * pixelColor[2];
break;
case MTEX_DIV:
if (pixelColor[0] != 0.0) {
result[0] = (oneMinusFactor * materialColor[0] + blendFactor * materialColor[0] / pixelColor[0]) * 0.5f;
}
if (pixelColor[1] != 0.0) {
result[1] = (oneMinusFactor * materialColor[1] + blendFactor * materialColor[1] / pixelColor[1]) * 0.5f;
}
if (pixelColor[2] != 0.0) {
result[2] = (oneMinusFactor * materialColor[2] + blendFactor * materialColor[2] / pixelColor[2]) * 0.5f;
}
break;
case MTEX_SCREEN:
result[0] = 1.0f - (oneMinusFactor + blendFactor * (1.0f - materialColor[0])) * (1.0f - pixelColor[0]);
result[1] = 1.0f - (oneMinusFactor + blendFactor * (1.0f - materialColor[1])) * (1.0f - pixelColor[1]);
result[2] = 1.0f - (oneMinusFactor + blendFactor * (1.0f - materialColor[2])) * (1.0f - pixelColor[2]);
break;
case MTEX_OVERLAY:
if (materialColor[0] < 0.5f) {
result[0] = pixelColor[0] * (oneMinusFactor + 2.0f * blendFactor * materialColor[0]);
} else {
result[0] = 1.0f - (oneMinusFactor + 2.0f * blendFactor * (1.0f - materialColor[0])) * (1.0f - pixelColor[0]);
}
if (materialColor[1] < 0.5f) {
result[1] = pixelColor[1] * (oneMinusFactor + 2.0f * blendFactor * materialColor[1]);
} else {
result[1] = 1.0f - (oneMinusFactor + 2.0f * blendFactor * (1.0f - materialColor[1])) * (1.0f - pixelColor[1]);
}
if (materialColor[2] < 0.5f) {
result[2] = pixelColor[2] * (oneMinusFactor + 2.0f * blendFactor * materialColor[2]);
} else {
result[2] = 1.0f - (oneMinusFactor + 2.0f * blendFactor * (1.0f - materialColor[2])) * (1.0f - pixelColor[2]);
}
break;
case MTEX_SUB:
result[0] = materialColor[0] - blendFactor * pixelColor[0];
result[1] = materialColor[1] - blendFactor * pixelColor[1];
result[2] = materialColor[2] - blendFactor * pixelColor[2];
result[0] = FastMath.clamp(result[0], 0.0f, 1.0f);
result[1] = FastMath.clamp(result[1], 0.0f, 1.0f);
result[2] = FastMath.clamp(result[2], 0.0f, 1.0f);
break;
case MTEX_ADD:
result[0] = (blendFactor * pixelColor[0] + materialColor[0]) * 0.5f;
result[1] = (blendFactor * pixelColor[1] + materialColor[1]) * 0.5f;
result[2] = (blendFactor * pixelColor[2] + materialColor[2]) * 0.5f;
break;
case MTEX_DIFF:
result[0] = oneMinusFactor * materialColor[0] + blendFactor * Math.abs(materialColor[0] - pixelColor[0]);
result[1] = oneMinusFactor * materialColor[1] + blendFactor * Math.abs(materialColor[1] - pixelColor[1]);
result[2] = oneMinusFactor * materialColor[2] + blendFactor * Math.abs(materialColor[2] - pixelColor[2]);
break;
case MTEX_DARK:
col = blendFactor * pixelColor[0];
result[0] = col < materialColor[0] ? col : materialColor[0];
col = blendFactor * pixelColor[1];
result[1] = col < materialColor[1] ? col : materialColor[1];
col = blendFactor * pixelColor[2];
result[2] = col < materialColor[2] ? col : materialColor[2];
break;
case MTEX_LIGHT:
col = blendFactor * pixelColor[0];
result[0] = col > materialColor[0] ? col : materialColor[0];
col = blendFactor * pixelColor[1];
result[1] = col > materialColor[1] ? col : materialColor[1];
col = blendFactor * pixelColor[2];
result[2] = col > materialColor[2] ? col : materialColor[2];
break;
case MTEX_BLEND_HUE:
case MTEX_BLEND_SAT:
case MTEX_BLEND_VAL:
case MTEX_BLEND_COLOR:
System.arraycopy(materialColor, 0, result, 0, 3);
this.blendHSV(blendtype, result, blendFactor, pixelColor, blenderContext);
break;
default:
throw new IllegalStateException("Unknown blend type: " + blendtype);
}
}
/**
* The method that performs the ramp blending.
*
* @param type
* the blend type
* @param materialRGB
* the rgb value of the material, here the result is stored too
* @param fac
* color affection factor
* @param pixelColor
* the texture color
* @param blenderContext
* the blender context
*/
protected void blendHSV(int type, float[] materialRGB, float fac, float[] pixelColor, BlenderContext blenderContext) {
float oneMinusFactor = 1.0f - fac;
MaterialHelper materialHelper = blenderContext.getHelper(MaterialHelper.class);
switch (type) {
case MTEX_BLEND_HUE: {// FIXME: not working well for image textures
// (works fine for generated textures)
float[] colorTransformResult = new float[3];
materialHelper.rgbToHsv(pixelColor[0], pixelColor[1], pixelColor[2], colorTransformResult);
if (colorTransformResult[0] != 0.0f) {
float colH = colorTransformResult[0];
materialHelper.rgbToHsv(materialRGB[0], materialRGB[1], materialRGB[2], colorTransformResult);
materialHelper.hsvToRgb(colH, colorTransformResult[1], colorTransformResult[2], colorTransformResult);
materialRGB[0] = oneMinusFactor * materialRGB[0] + fac * colorTransformResult[0];
materialRGB[1] = oneMinusFactor * materialRGB[1] + fac * colorTransformResult[1];
materialRGB[2] = oneMinusFactor * materialRGB[2] + fac * colorTransformResult[2];
}
break;
}
case MTEX_BLEND_SAT: {
float[] colorTransformResult = new float[3];
materialHelper.rgbToHsv(materialRGB[0], materialRGB[1], materialRGB[2], colorTransformResult);
float h = colorTransformResult[0];
float s = colorTransformResult[1];
float v = colorTransformResult[2];
if (s != 0.0f) {
materialHelper.rgbToHsv(pixelColor[0], pixelColor[1], pixelColor[2], colorTransformResult);
materialHelper.hsvToRgb(h, (oneMinusFactor * s + fac * colorTransformResult[1]), v, materialRGB);
}
break;
}
case MTEX_BLEND_VAL: {
float[] rgbToHsv = new float[3];
float[] colToHsv = new float[3];
materialHelper.rgbToHsv(materialRGB[0], materialRGB[1], materialRGB[2], rgbToHsv);
materialHelper.rgbToHsv(pixelColor[0], pixelColor[1], pixelColor[2], colToHsv);
materialHelper.hsvToRgb(rgbToHsv[0], rgbToHsv[1], (oneMinusFactor * rgbToHsv[2] + fac * colToHsv[2]), materialRGB);
break;
}
case MTEX_BLEND_COLOR: {// FIXME: not working well for image
// textures (works fine for generated
// textures)
float[] rgbToHsv = new float[3];
float[] colToHsv = new float[3];
materialHelper.rgbToHsv(pixelColor[0], pixelColor[1], pixelColor[2], colToHsv);
if (colToHsv[2] != 0) {
materialHelper.rgbToHsv(materialRGB[0], materialRGB[1], materialRGB[2], rgbToHsv);
materialHelper.hsvToRgb(colToHsv[0], colToHsv[1], rgbToHsv[2], rgbToHsv);
materialRGB[0] = oneMinusFactor * materialRGB[0] + fac * rgbToHsv[0];
materialRGB[1] = oneMinusFactor * materialRGB[1] + fac * rgbToHsv[1];
materialRGB[2] = oneMinusFactor * materialRGB[2] + fac * rgbToHsv[2];
}
break;
}
default:
throw new IllegalStateException("Unknown ramp type: " + type);
}
}
}
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