private void modifyProjectionMatrix(final Vector4 clipPlane) {
// Get the current projection matrix
projectionMatrix = cam.getProjectionMatrix().toArray(projectionMatrix);
// Get the inverse transpose of the current modelview matrix
final ReadOnlyMatrix4 modelViewMatrixInvTrans =
tRenderer.getCamera().getModelViewMatrix().invert(tmpMatrix).transposeLocal();
modelViewMatrixInvTrans.applyPre(clipPlane, clipPlane);
// Calculate the clip-space corner point opposite the clipping plane
// as (sgn(clipPlane.x), sgn(clipPlane.y), 1, 1) and
// transform it into camera space by multiplying it
// by the inverse of the projection matrix
cornerPoint.setX((sign(clipPlane.getX()) + projectionMatrix[8]) / projectionMatrix[0]);
cornerPoint.setY((sign(clipPlane.getY()) + projectionMatrix[9]) / projectionMatrix[5]);
cornerPoint.setZ(-1.0);
cornerPoint.setW((1.0 + projectionMatrix[10]) / projectionMatrix[14]);
// Calculate the scaled plane vector
final Vector4 scaledPlaneVector =
clipPlane.multiply((2.0 / clipPlane.dot(cornerPoint)), cornerPoint);
// Replace the third row of the projection matrix
projectionMatrix[2] = scaledPlaneVector.getX();
projectionMatrix[6] = scaledPlaneVector.getY();
projectionMatrix[10] = scaledPlaneVector.getZ() + 1.0;
projectionMatrix[14] = scaledPlaneVector.getW();
// Load it back into OpenGL
final Matrix4 newProjectionMatrix = tmpMatrix.fromArray(projectionMatrix);
tRenderer.getCamera().setProjectionMatrix(newProjectionMatrix);
}
@Override
public void draw(final Renderer r) {
initialize(r);
updateTranslations();
final double camWaterDist = waterPlane.pseudoDistance(cam.getLocation());
aboveWater = camWaterDist >= 0;
if (isSupported()) {
waterShader.setUniform("tangent", tangent);
waterShader.setUniform("binormal", binormal);
waterShader.setUniform("useFadeToFogColor", useFadeToFogColor);
waterShader.setUniform("waterColor", waterColorStart);
waterShader.setUniform("waterColorEnd", waterColorEnd);
waterShader.setUniform("normalTranslation", (float) normalTranslation);
waterShader.setUniform("refractionTranslation", (float) refractionTranslation);
waterShader.setUniform("abovewater", aboveWater);
if (useProjectedShader) {
waterShader.setUniform("cameraPos", cam.getLocation());
waterShader.setUniform("waterHeight", (float) waterPlane.getConstant());
waterShader.setUniform("amplitude", (float) waterMaxAmplitude);
waterShader.setUniform("heightFalloffStart", (float) heightFalloffStart);
waterShader.setUniform("heightFalloffSpeed", (float) heightFalloffSpeed);
}
final double heightTotal = clipBias + waterMaxAmplitude - waterPlane.getConstant();
final Vector4 clipPlane = Vector4.fetchTempInstance();
if (useReflection) {
clipPlane.set(
waterPlane.getNormal().getX(),
waterPlane.getNormal().getY(),
waterPlane.getNormal().getZ(),
heightTotal);
renderReflection(clipPlane);
}
if (useRefraction && aboveWater) {
clipPlane.set(
-waterPlane.getNormal().getX(),
-waterPlane.getNormal().getY(),
-waterPlane.getNormal().getZ(),
-waterPlane.getConstant());
renderRefraction(clipPlane);
}
}
if (fallbackTextureState != null) {
fallbackTextureStateMatrix.setM31(normalTranslation);
fallbackTexture.setTextureMatrix(fallbackTextureStateMatrix);
}
super.draw(r);
}
public void updateTextureMatrix(final Matrix4 matrixStore) {
update();
final ReadOnlyMatrix4 projectorView = getModelViewMatrix();
final ReadOnlyMatrix4 projectorProjection = getProjectionMatrix();
matrixStore.set(projectorView).multiplyLocal(projectorProjection).multiplyLocal(BIAS);
}
/** Load water textures. */
protected void setupTextures() {
textureReflect = new Texture2D();
textureReflect.setWrap(Texture.WrapMode.EdgeClamp);
textureReflect.setMagnificationFilter(Texture.MagnificationFilter.Bilinear);
Matrix4 matrix = new Matrix4();
matrix.setM00(-1.0);
matrix.setM30(1.0);
textureReflect.setTextureMatrix(matrix);
tRenderer.setupTexture(textureReflect);
normalmapTexture =
TextureManager.load(
normalMapTextureString,
Texture.MinificationFilter.Trilinear,
TextureStoreFormat.GuessCompressedFormat,
true);
textureState.setTexture(normalmapTexture, 0);
normalmapTexture.setWrap(Texture.WrapMode.Repeat);
textureReflectBlur = new Texture2D();
textureReflectBlur.setWrap(Texture.WrapMode.EdgeClamp);
textureReflectBlur.setMagnificationFilter(Texture.MagnificationFilter.Bilinear);
textureReflectBlur.setTextureMatrix(matrix);
tRenderer.setupTexture(textureReflectBlur);
textureState.setTexture(textureReflectBlur, 1);
dudvTexture =
TextureManager.load(
dudvMapTextureString,
Texture.MinificationFilter.Trilinear,
TextureStoreFormat.GuessNoCompressedFormat,
true);
matrix = new Matrix4();
matrix.setM00(0.8);
matrix.setM11(0.8);
dudvTexture.setTextureMatrix(matrix);
textureState.setTexture(dudvTexture, 2);
dudvTexture.setWrap(Texture.WrapMode.Repeat);
if (useRefraction) {
textureRefract = new Texture2D();
textureRefract.setWrap(Texture.WrapMode.EdgeClamp);
textureRefract.setMagnificationFilter(Texture.MagnificationFilter.Bilinear);
tRenderer.setupTexture(textureRefract);
textureDepth = new Texture2D();
textureDepth.setWrap(Texture.WrapMode.EdgeClamp);
textureDepth.setMagnificationFilter(Texture.MagnificationFilter.NearestNeighbor);
textureDepth.setTextureStoreFormat(TextureStoreFormat.Depth24);
tRenderer.setupTexture(textureDepth);
textureState.setTexture(textureRefract, 3);
textureState.setTexture(textureDepth, 4);
}
if (useProjectedShader) {
foamTexture =
TextureManager.load(
foamMapTextureString,
Texture.MinificationFilter.Trilinear,
TextureStoreFormat.GuessCompressedFormat,
true);
if (useRefraction) {
textureState.setTexture(foamTexture, 5);
} else {
textureState.setTexture(foamTexture, 3);
}
foamTexture.setWrap(Texture.WrapMode.Repeat);
}
reloadShader();
}
public void updateTextureMatrix(final Texture texture) {
final Matrix4 texMat = Matrix4.fetchTempInstance();
updateTextureMatrix(texMat);
texture.setTextureMatrix(texMat);
Matrix4.releaseTempInstance(texMat);
}