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|
# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2014-2017 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ############################################################################*/
"""
This module provides classes to render 2D lines and scatter plots
"""
__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "03/04/2017"
import math
import logging
import numpy
from silx.math.combo import min_max
from ...._glutils import gl
from ...._glutils import numpyToGLType, Program, vertexBuffer
from ..._utils import FLOAT32_MINPOS
from .GLSupport import buildFillMaskIndices
_logger = logging.getLogger(__name__)
_MPL_NONES = None, 'None', '', ' '
# fill ########################################################################
class _Fill2D(object):
_LINEAR, _LOG10_X, _LOG10_Y, _LOG10_X_Y = 0, 1, 2, 3
_SHADERS = {
'vertexTransforms': {
_LINEAR: """
vec4 transformXY(float x, float y) {
return vec4(x, y, 0.0, 1.0);
}
""",
_LOG10_X: """
const float oneOverLog10 = 0.43429448190325176;
vec4 transformXY(float x, float y) {
return vec4(oneOverLog10 * log(x), y, 0.0, 1.0);
}
""",
_LOG10_Y: """
const float oneOverLog10 = 0.43429448190325176;
vec4 transformXY(float x, float y) {
return vec4(x, oneOverLog10 * log(y), 0.0, 1.0);
}
""",
_LOG10_X_Y: """
const float oneOverLog10 = 0.43429448190325176;
vec4 transformXY(float x, float y) {
return vec4(oneOverLog10 * log(x),
oneOverLog10 * log(y),
0.0, 1.0);
}
"""
},
'vertex': """
#version 120
uniform mat4 matrix;
attribute float xPos;
attribute float yPos;
%s
void main(void) {
gl_Position = matrix * transformXY(xPos, yPos);
}
""",
'fragment': """
#version 120
uniform vec4 color;
void main(void) {
gl_FragColor = color;
}
"""
}
_programs = {
_LINEAR: Program(
_SHADERS['vertex'] % _SHADERS['vertexTransforms'][_LINEAR],
_SHADERS['fragment'], attrib0='xPos'),
_LOG10_X: Program(
_SHADERS['vertex'] % _SHADERS['vertexTransforms'][_LOG10_X],
_SHADERS['fragment'], attrib0='xPos'),
_LOG10_Y: Program(
_SHADERS['vertex'] % _SHADERS['vertexTransforms'][_LOG10_Y],
_SHADERS['fragment'], attrib0='xPos'),
_LOG10_X_Y: Program(
_SHADERS['vertex'] % _SHADERS['vertexTransforms'][_LOG10_X_Y],
_SHADERS['fragment'], attrib0='xPos'),
}
def __init__(self, xFillVboData=None, yFillVboData=None,
xMin=None, yMin=None, xMax=None, yMax=None,
color=(0., 0., 0., 1.)):
self.xFillVboData = xFillVboData
self.yFillVboData = yFillVboData
self.xMin, self.yMin = xMin, yMin
self.xMax, self.yMax = xMax, yMax
self.color = color
self._bboxVertices = None
self._indices = None
self._indicesType = None
def prepare(self):
if self._indices is None:
self._indices = buildFillMaskIndices(self.xFillVboData.size)
self._indicesType = numpyToGLType(self._indices.dtype)
if self._bboxVertices is None:
yMin, yMax = min(self.yMin, 1e-32), max(self.yMax, 1e-32)
self._bboxVertices = numpy.array(((self.xMin, self.xMin,
self.xMax, self.xMax),
(yMin, yMax, yMin, yMax)),
dtype=numpy.float32)
def render(self, matrix, isXLog, isYLog):
self.prepare()
if isXLog:
transform = self._LOG10_X_Y if isYLog else self._LOG10_X
else:
transform = self._LOG10_Y if isYLog else self._LINEAR
prog = self._programs[transform]
prog.use()
gl.glUniformMatrix4fv(prog.uniforms['matrix'], 1, gl.GL_TRUE, matrix)
gl.glUniform4f(prog.uniforms['color'], *self.color)
xPosAttrib = prog.attributes['xPos']
yPosAttrib = prog.attributes['yPos']
gl.glEnableVertexAttribArray(xPosAttrib)
self.xFillVboData.setVertexAttrib(xPosAttrib)
gl.glEnableVertexAttribArray(yPosAttrib)
self.yFillVboData.setVertexAttrib(yPosAttrib)
# Prepare fill mask
gl.glEnable(gl.GL_STENCIL_TEST)
gl.glStencilMask(1)
gl.glStencilFunc(gl.GL_ALWAYS, 1, 1)
gl.glStencilOp(gl.GL_INVERT, gl.GL_INVERT, gl.GL_INVERT)
gl.glColorMask(gl.GL_FALSE, gl.GL_FALSE, gl.GL_FALSE, gl.GL_FALSE)
gl.glDepthMask(gl.GL_FALSE)
gl.glDrawElements(gl.GL_TRIANGLE_STRIP, self._indices.size,
self._indicesType, self._indices)
gl.glStencilFunc(gl.GL_EQUAL, 1, 1)
# Reset stencil while drawing
gl.glStencilOp(gl.GL_ZERO, gl.GL_ZERO, gl.GL_ZERO)
gl.glColorMask(gl.GL_TRUE, gl.GL_TRUE, gl.GL_TRUE, gl.GL_TRUE)
gl.glDepthMask(gl.GL_TRUE)
gl.glVertexAttribPointer(xPosAttrib, 1, gl.GL_FLOAT, gl.GL_FALSE, 0,
self._bboxVertices[0])
gl.glVertexAttribPointer(yPosAttrib, 1, gl.GL_FLOAT, gl.GL_FALSE, 0,
self._bboxVertices[1])
gl.glDrawArrays(gl.GL_TRIANGLE_STRIP, 0, self._bboxVertices[0].size)
gl.glDisable(gl.GL_STENCIL_TEST)
# line ########################################################################
SOLID, DASHED, DASHDOT, DOTTED = '-', '--', '-.', ':'
class _Lines2D(object):
STYLES = SOLID, DASHED, DASHDOT, DOTTED
"""Supported line styles"""
_LINEAR, _LOG10_X, _LOG10_Y, _LOG10_X_Y = 0, 1, 2, 3
_SHADERS = {
'vertexTransforms': {
_LINEAR: """
vec4 transformXY(float x, float y) {
return vec4(x, y, 0.0, 1.0);
}
""",
_LOG10_X: """
const float oneOverLog10 = 0.43429448190325176;
vec4 transformXY(float x, float y) {
return vec4(oneOverLog10 * log(x), y, 0.0, 1.0);
}
""",
_LOG10_Y: """
const float oneOverLog10 = 0.43429448190325176;
vec4 transformXY(float x, float y) {
return vec4(x, oneOverLog10 * log(y), 0.0, 1.0);
}
""",
_LOG10_X_Y: """
const float oneOverLog10 = 0.43429448190325176;
vec4 transformXY(float x, float y) {
return vec4(oneOverLog10 * log(x),
oneOverLog10 * log(y),
0.0, 1.0);
}
"""
},
'solid': {
'vertex': """
#version 120
uniform mat4 matrix;
attribute float xPos;
attribute float yPos;
attribute vec4 color;
varying vec4 vColor;
%s
void main(void) {
gl_Position = matrix * transformXY(xPos, yPos);
vColor = color;
}
""",
'fragment': """
#version 120
varying vec4 vColor;
void main(void) {
gl_FragColor = vColor;
}
"""
},
# Limitation: Dash using an estimate of distance in screen coord
# to avoid computing distance when viewport is resized
# results in inequal dashes when viewport aspect ratio is far from 1
'dashed': {
'vertex': """
#version 120
uniform mat4 matrix;
uniform vec2 halfViewportSize;
attribute float xPos;
attribute float yPos;
attribute vec4 color;
attribute float distance;
varying float vDist;
varying vec4 vColor;
%s
void main(void) {
gl_Position = matrix * transformXY(xPos, yPos);
//Estimate distance in pixels
vec2 probe = vec2(matrix * vec4(1., 1., 0., 0.)) *
halfViewportSize;
float pixelPerDataEstimate = length(probe)/sqrt(2.);
vDist = distance * pixelPerDataEstimate;
vColor = color;
}
""",
'fragment': """
#version 120
/* Dashes: [0, x], [y, z]
Dash period: w */
uniform vec4 dash;
varying float vDist;
varying vec4 vColor;
void main(void) {
float dist = mod(vDist, dash.w);
if ((dist > dash.x && dist < dash.y) || dist > dash.z) {
discard;
}
gl_FragColor = vColor;
}
"""
}
}
_programs = {}
def __init__(self, xVboData=None, yVboData=None,
colorVboData=None, distVboData=None,
style=SOLID, color=(0., 0., 0., 1.),
width=1, dashPeriod=20, drawMode=None):
self.xVboData = xVboData
self.yVboData = yVboData
self.distVboData = distVboData
self.colorVboData = colorVboData
self.useColorVboData = colorVboData is not None
self.color = color
self._width = 1
self.width = width
self._style = None
self.style = style
self.dashPeriod = dashPeriod
self._drawMode = drawMode if drawMode is not None else gl.GL_LINE_STRIP
@property
def style(self):
return self._style
@style.setter
def style(self, style):
if style in _MPL_NONES:
self._style = None
self.render = self._renderNone
else:
assert style in self.STYLES
self._style = style
if style == SOLID:
self.render = self._renderSolid
else: # DASHED, DASHDOT, DOTTED
self.render = self._renderDash
@property
def width(self):
return self._width
@width.setter
def width(self, width):
# try:
# widthRange = self._widthRange
# except AttributeError:
# widthRange = gl.glGetFloatv(gl.GL_ALIASED_LINE_WIDTH_RANGE)
# # Shared among contexts, this should be enough..
# _Lines2D._widthRange = widthRange
# assert width >= widthRange[0] and width <= widthRange[1]
self._width = width
@classmethod
def _getProgram(cls, transform, style):
try:
prgm = cls._programs[(transform, style)]
except KeyError:
sources = cls._SHADERS[style]
vertexShdr = sources['vertex'] % \
cls._SHADERS['vertexTransforms'][transform]
prgm = Program(vertexShdr, sources['fragment'], attrib0='xPos')
cls._programs[(transform, style)] = prgm
return prgm
@classmethod
def init(cls):
gl.glHint(gl.GL_LINE_SMOOTH_HINT, gl.GL_NICEST)
def _renderNone(self, matrix, isXLog, isYLog):
pass
render = _renderNone # Overridden in style setter
def _renderSolid(self, matrix, isXLog, isYLog):
if isXLog:
transform = self._LOG10_X_Y if isYLog else self._LOG10_X
else:
transform = self._LOG10_Y if isYLog else self._LINEAR
prog = self._getProgram(transform, 'solid')
prog.use()
gl.glEnable(gl.GL_LINE_SMOOTH)
gl.glUniformMatrix4fv(prog.uniforms['matrix'], 1, gl.GL_TRUE, matrix)
colorAttrib = prog.attributes['color']
if self.useColorVboData and self.colorVboData is not None:
gl.glEnableVertexAttribArray(colorAttrib)
self.colorVboData.setVertexAttrib(colorAttrib)
else:
gl.glDisableVertexAttribArray(colorAttrib)
gl.glVertexAttrib4f(colorAttrib, *self.color)
xPosAttrib = prog.attributes['xPos']
gl.glEnableVertexAttribArray(xPosAttrib)
self.xVboData.setVertexAttrib(xPosAttrib)
yPosAttrib = prog.attributes['yPos']
gl.glEnableVertexAttribArray(yPosAttrib)
self.yVboData.setVertexAttrib(yPosAttrib)
gl.glLineWidth(self.width)
gl.glDrawArrays(self._drawMode, 0, self.xVboData.size)
gl.glDisable(gl.GL_LINE_SMOOTH)
def _renderDash(self, matrix, isXLog, isYLog):
if isXLog:
transform = self._LOG10_X_Y if isYLog else self._LOG10_X
else:
transform = self._LOG10_Y if isYLog else self._LINEAR
prog = self._getProgram(transform, 'dashed')
prog.use()
gl.glEnable(gl.GL_LINE_SMOOTH)
gl.glUniformMatrix4fv(prog.uniforms['matrix'], 1, gl.GL_TRUE, matrix)
x, y, viewWidth, viewHeight = gl.glGetFloatv(gl.GL_VIEWPORT)
gl.glUniform2f(prog.uniforms['halfViewportSize'],
0.5 * viewWidth, 0.5 * viewHeight)
if self.style == DOTTED:
dash = (0.1 * self.dashPeriod,
0.6 * self.dashPeriod,
0.7 * self.dashPeriod,
self.dashPeriod)
elif self.style == DASHDOT:
dash = (0.3 * self.dashPeriod,
0.5 * self.dashPeriod,
0.6 * self.dashPeriod,
self.dashPeriod)
else:
dash = (0.5 * self.dashPeriod,
self.dashPeriod,
self.dashPeriod,
self.dashPeriod)
gl.glUniform4f(prog.uniforms['dash'], *dash)
colorAttrib = prog.attributes['color']
if self.useColorVboData and self.colorVboData is not None:
gl.glEnableVertexAttribArray(colorAttrib)
self.colorVboData.setVertexAttrib(colorAttrib)
else:
gl.glDisableVertexAttribArray(colorAttrib)
gl.glVertexAttrib4f(colorAttrib, *self.color)
distAttrib = prog.attributes['distance']
gl.glEnableVertexAttribArray(distAttrib)
self.distVboData.setVertexAttrib(distAttrib)
xPosAttrib = prog.attributes['xPos']
gl.glEnableVertexAttribArray(xPosAttrib)
self.xVboData.setVertexAttrib(xPosAttrib)
yPosAttrib = prog.attributes['yPos']
gl.glEnableVertexAttribArray(yPosAttrib)
self.yVboData.setVertexAttrib(yPosAttrib)
gl.glLineWidth(self.width)
gl.glDrawArrays(self._drawMode, 0, self.xVboData.size)
gl.glDisable(gl.GL_LINE_SMOOTH)
def _distancesFromArrays(xData, yData):
deltas = numpy.dstack((
numpy.ediff1d(xData, to_begin=numpy.float32(0.)),
numpy.ediff1d(yData, to_begin=numpy.float32(0.))))[0]
return numpy.cumsum(numpy.sqrt(numpy.sum(deltas ** 2, axis=1)))
# points ######################################################################
DIAMOND, CIRCLE, SQUARE, PLUS, X_MARKER, POINT, PIXEL, ASTERISK = \
'd', 'o', 's', '+', 'x', '.', ',', '*'
H_LINE, V_LINE = '_', '|'
class _Points2D(object):
MARKERS = (DIAMOND, CIRCLE, SQUARE, PLUS, X_MARKER, POINT, PIXEL, ASTERISK,
H_LINE, V_LINE)
_LINEAR, _LOG10_X, _LOG10_Y, _LOG10_X_Y = 0, 1, 2, 3
_SHADERS = {
'vertexTransforms': {
_LINEAR: """
vec4 transformXY(float x, float y) {
return vec4(x, y, 0.0, 1.0);
}
""",
_LOG10_X: """
const float oneOverLog10 = 0.43429448190325176;
vec4 transformXY(float x, float y) {
return vec4(oneOverLog10 * log(x), y, 0.0, 1.0);
}
""",
_LOG10_Y: """
const float oneOverLog10 = 0.43429448190325176;
vec4 transformXY(float x, float y) {
return vec4(x, oneOverLog10 * log(y), 0.0, 1.0);
}
""",
_LOG10_X_Y: """
const float oneOverLog10 = 0.43429448190325176;
vec4 transformXY(float x, float y) {
return vec4(oneOverLog10 * log(x),
oneOverLog10 * log(y),
0.0, 1.0);
}
"""
},
'vertex': """
#version 120
uniform mat4 matrix;
uniform int transform;
uniform float size;
attribute float xPos;
attribute float yPos;
attribute vec4 color;
varying vec4 vColor;
%s
void main(void) {
gl_Position = matrix * transformXY(xPos, yPos);
vColor = color;
gl_PointSize = size;
}
""",
'fragmentSymbols': {
DIAMOND: """
float alphaSymbol(vec2 coord, float size) {
vec2 centerCoord = abs(coord - vec2(0.5, 0.5));
float f = centerCoord.x + centerCoord.y;
return clamp(size * (0.5 - f), 0.0, 1.0);
}
""",
CIRCLE: """
float alphaSymbol(vec2 coord, float size) {
float radius = 0.5;
float r = distance(coord, vec2(0.5, 0.5));
return clamp(size * (radius - r), 0.0, 1.0);
}
""",
SQUARE: """
float alphaSymbol(vec2 coord, float size) {
return 1.0;
}
""",
PLUS: """
float alphaSymbol(vec2 coord, float size) {
vec2 d = abs(size * (coord - vec2(0.5, 0.5)));
if (min(d.x, d.y) < 0.5) {
return 1.0;
} else {
return 0.0;
}
}
""",
X_MARKER: """
float alphaSymbol(vec2 coord, float size) {
vec2 pos = floor(size * coord) + 0.5;
vec2 d_x = abs(pos.x + vec2(- pos.y, pos.y - size));
if (min(d_x.x, d_x.y) <= 0.5) {
return 1.0;
} else {
return 0.0;
}
}
""",
ASTERISK: """
float alphaSymbol(vec2 coord, float size) {
/* Combining +, x and cirle */
vec2 d_plus = abs(size * (coord - vec2(0.5, 0.5)));
vec2 pos = floor(size * coord) + 0.5;
vec2 d_x = abs(pos.x + vec2(- pos.y, pos.y - size));
if (min(d_plus.x, d_plus.y) < 0.5) {
return 1.0;
} else if (min(d_x.x, d_x.y) <= 0.5) {
float r = distance(coord, vec2(0.5, 0.5));
return clamp(size * (0.5 - r), 0.0, 1.0);
} else {
return 0.0;
}
}
""",
H_LINE: """
float alphaSymbol(vec2 coord, float size) {
float dy = abs(size * (coord.y - 0.5));
if (dy < 0.5) {
return 1.0;
} else {
return 0.0;
}
}
""",
V_LINE: """
float alphaSymbol(vec2 coord, float size) {
float dx = abs(size * (coord.x - 0.5));
if (dx < 0.5) {
return 1.0;
} else {
return 0.0;
}
}
"""
},
'fragment': """
#version 120
uniform float size;
varying vec4 vColor;
%s
void main(void) {
float alpha = alphaSymbol(gl_PointCoord, size);
if (alpha <= 0.0) {
discard;
} else {
gl_FragColor = vec4(vColor.rgb, alpha * clamp(vColor.a, 0.0, 1.0));
}
}
"""
}
_programs = {}
def __init__(self, xVboData=None, yVboData=None, colorVboData=None,
marker=SQUARE, color=(0., 0., 0., 1.), size=7):
self.color = color
self._marker = None
self.marker = marker
self._size = 1
self.size = size
self.xVboData = xVboData
self.yVboData = yVboData
self.colorVboData = colorVboData
self.useColorVboData = colorVboData is not None
@property
def marker(self):
return self._marker
@marker.setter
def marker(self, marker):
if marker in _MPL_NONES:
self._marker = None
self.render = self._renderNone
else:
assert marker in self.MARKERS
self._marker = marker
self.render = self._renderMarkers
@property
def size(self):
return self._size
@size.setter
def size(self, size):
# try:
# sizeRange = self._sizeRange
# except AttributeError:
# sizeRange = gl.glGetFloatv(gl.GL_POINT_SIZE_RANGE)
# # Shared among contexts, this should be enough..
# _Points2D._sizeRange = sizeRange
# assert size >= sizeRange[0] and size <= sizeRange[1]
self._size = size
@classmethod
def _getProgram(cls, transform, marker):
"""On-demand shader program creation."""
if marker == PIXEL:
marker = SQUARE
elif marker == POINT:
marker = CIRCLE
try:
prgm = cls._programs[(transform, marker)]
except KeyError:
vertShdr = cls._SHADERS['vertex'] % \
cls._SHADERS['vertexTransforms'][transform]
fragShdr = cls._SHADERS['fragment'] % \
cls._SHADERS['fragmentSymbols'][marker]
prgm = Program(vertShdr, fragShdr, attrib0='xPos')
cls._programs[(transform, marker)] = prgm
return prgm
@classmethod
def init(cls):
version = gl.glGetString(gl.GL_VERSION)
majorVersion = int(version[0])
assert majorVersion >= 2
gl.glEnable(gl.GL_VERTEX_PROGRAM_POINT_SIZE) # OpenGL 2
gl.glEnable(gl.GL_POINT_SPRITE) # OpenGL 2
if majorVersion >= 3: # OpenGL 3
gl.glEnable(gl.GL_PROGRAM_POINT_SIZE)
def _renderNone(self, matrix, isXLog, isYLog):
pass
render = _renderNone
def _renderMarkers(self, matrix, isXLog, isYLog):
if isXLog:
transform = self._LOG10_X_Y if isYLog else self._LOG10_X
else:
transform = self._LOG10_Y if isYLog else self._LINEAR
prog = self._getProgram(transform, self.marker)
prog.use()
gl.glUniformMatrix4fv(prog.uniforms['matrix'], 1, gl.GL_TRUE, matrix)
if self.marker == PIXEL:
size = 1
elif self.marker == POINT:
size = math.ceil(0.5 * self.size) + 1 # Mimic Matplotlib point
else:
size = self.size
gl.glUniform1f(prog.uniforms['size'], size)
# gl.glPointSize(self.size)
cAttrib = prog.attributes['color']
if self.useColorVboData and self.colorVboData is not None:
gl.glEnableVertexAttribArray(cAttrib)
self.colorVboData.setVertexAttrib(cAttrib)
else:
gl.glDisableVertexAttribArray(cAttrib)
gl.glVertexAttrib4f(cAttrib, *self.color)
xAttrib = prog.attributes['xPos']
gl.glEnableVertexAttribArray(xAttrib)
self.xVboData.setVertexAttrib(xAttrib)
yAttrib = prog.attributes['yPos']
gl.glEnableVertexAttribArray(yAttrib)
self.yVboData.setVertexAttrib(yAttrib)
gl.glDrawArrays(gl.GL_POINTS, 0, self.xVboData.size)
gl.glUseProgram(0)
# error bars ##################################################################
class _ErrorBars(object):
"""Display errors bars.
This is using its own VBO as opposed to fill/points/lines.
There is no picking on error bars.
As is, there is no way to update data and errors, but it handles
log scales by removing data <= 0 and clipping error bars to positive
range.
It uses 2 vertices per error bars and uses :class:`_Lines2D` to
render error bars and :class:`_Points2D` to render the ends.
"""
def __init__(self, xData, yData, xError, yError,
xMin, yMin,
color=(0., 0., 0., 1.)):
"""Initialization.
:param numpy.ndarray xData: X coordinates of the data.
:param numpy.ndarray yData: Y coordinates of the data.
:param xError: The absolute error on the X axis.
:type xError: A float, or a numpy.ndarray of float32.
If it is an array, it can either be a 1D array of
same length as the data or a 2D array with 2 rows
of same length as the data: row 0 for negative errors,
row 1 for positive errors.
:param yError: The absolute error on the Y axis.
:type yError: A float, or a numpy.ndarray of float32. See xError.
:param float xMin: The min X value already computed by GLPlotCurve2D.
:param float yMin: The min Y value already computed by GLPlotCurve2D.
:param color: The color to use for both lines and ending points.
:type color: tuple of 4 floats
"""
self._attribs = None
self._isXLog, self._isYLog = False, False
self._xMin, self._yMin = xMin, yMin
if xError is not None or yError is not None:
assert len(xData) == len(yData)
self._xData = numpy.array(
xData, order='C', dtype=numpy.float32, copy=False)
self._yData = numpy.array(
yData, order='C', dtype=numpy.float32, copy=False)
# This also works if xError, yError is a float/int
self._xError = numpy.array(
xError, order='C', dtype=numpy.float32, copy=False)
self._yError = numpy.array(
yError, order='C', dtype=numpy.float32, copy=False)
else:
self._xData, self._yData = None, None
self._xError, self._yError = None, None
self._lines = _Lines2D(None, None, color=color, drawMode=gl.GL_LINES)
self._xErrPoints = _Points2D(None, None, color=color, marker=V_LINE)
self._yErrPoints = _Points2D(None, None, color=color, marker=H_LINE)
def _positiveValueFilter(self, onlyXPos, onlyYPos):
"""Filter data (x, y) and errors (xError, yError) to remove
negative and null data values on required axis (onlyXPos, onlyYPos).
Returned arrays might be NOT contiguous.
:return: Filtered xData, yData, xError and yError arrays.
"""
if ((not onlyXPos or self._xMin > 0.) and
(not onlyYPos or self._yMin > 0.)):
# No need to filter, all values are > 0 on log axes
return self._xData, self._yData, self._xError, self._yError
_logger.warning(
'Removing values <= 0 of curve with error bars on a log axis.')
x, y = self._xData, self._yData
xError, yError = self._xError, self._yError
# First remove negative data
if onlyXPos and onlyYPos:
mask = (x > 0.) & (y > 0.)
elif onlyXPos:
mask = x > 0.
else: # onlyYPos
mask = y > 0.
x, y = x[mask], y[mask]
# Remove corresponding values from error arrays
if xError is not None and xError.size != 1:
if len(xError.shape) == 1:
xError = xError[mask]
else: # 2 rows
xError = xError[:, mask]
if yError is not None and yError.size != 1:
if len(yError.shape) == 1:
yError = yError[mask]
else: # 2 rows
yError = yError[:, mask]
return x, y, xError, yError
def _buildVertices(self, isXLog, isYLog):
"""Generates error bars vertices according to log scales."""
xData, yData, xError, yError = self._positiveValueFilter(
isXLog, isYLog)
nbLinesPerDataPts = 1 if xError is not None else 0
nbLinesPerDataPts += 1 if yError is not None else 0
nbDataPts = len(xData)
# interleave coord+error, coord-error.
# xError vertices first if any, then yError vertices if any.
xCoords = numpy.empty(nbDataPts * nbLinesPerDataPts * 2,
dtype=numpy.float32)
yCoords = numpy.empty(nbDataPts * nbLinesPerDataPts * 2,
dtype=numpy.float32)
if xError is not None: # errors on the X axis
if len(xError.shape) == 2:
xErrorMinus, xErrorPlus = xError[0], xError[1]
else:
# numpy arrays of len 1 or len(xData)
xErrorMinus, xErrorPlus = xError, xError
# Interleave vertices for xError
endXError = 2 * nbDataPts
xCoords[0:endXError-1:2] = xData + xErrorPlus
minValues = xData - xErrorMinus
if isXLog:
# Clip min bounds to positive value
minValues[minValues <= 0] = FLOAT32_MINPOS
xCoords[1:endXError:2] = minValues
yCoords[0:endXError-1:2] = yData
yCoords[1:endXError:2] = yData
else:
endXError = 0
if yError is not None: # errors on the Y axis
if len(yError.shape) == 2:
yErrorMinus, yErrorPlus = yError[0], yError[1]
else:
# numpy arrays of len 1 or len(yData)
yErrorMinus, yErrorPlus = yError, yError
# Interleave vertices for yError
xCoords[endXError::2] = xData
xCoords[endXError+1::2] = xData
yCoords[endXError::2] = yData + yErrorPlus
minValues = yData - yErrorMinus
if isYLog:
# Clip min bounds to positive value
minValues[minValues <= 0] = FLOAT32_MINPOS
yCoords[endXError+1::2] = minValues
return xCoords, yCoords
def prepare(self, isXLog, isYLog):
if self._xData is None:
return
if self._isXLog != isXLog or self._isYLog != isYLog:
# Log state has changed
self._isXLog, self._isYLog = isXLog, isYLog
self.discard() # discard existing VBOs
if self._attribs is None:
xCoords, yCoords = self._buildVertices(isXLog, isYLog)
xAttrib, yAttrib = vertexBuffer((xCoords, yCoords))
self._attribs = xAttrib, yAttrib
self._lines.xVboData, self._lines.yVboData = xAttrib, yAttrib
# Set xError points using the same VBO as lines
self._xErrPoints.xVboData = xAttrib.copy()
self._xErrPoints.xVboData.size //= 2
self._xErrPoints.yVboData = yAttrib.copy()
self._xErrPoints.yVboData.size //= 2
# Set yError points using the same VBO as lines
self._yErrPoints.xVboData = xAttrib.copy()
self._yErrPoints.xVboData.size //= 2
self._yErrPoints.xVboData.offset += (xAttrib.itemsize *
xAttrib.size // 2)
self._yErrPoints.yVboData = yAttrib.copy()
self._yErrPoints.yVboData.size //= 2
self._yErrPoints.yVboData.offset += (yAttrib.itemsize *
yAttrib.size // 2)
def render(self, matrix, isXLog, isYLog):
if self._attribs is not None:
self._lines.render(matrix, isXLog, isYLog)
self._xErrPoints.render(matrix, isXLog, isYLog)
self._yErrPoints.render(matrix, isXLog, isYLog)
def discard(self):
if self._attribs is not None:
self._lines.xVboData, self._lines.yVboData = None, None
self._xErrPoints.xVboData, self._xErrPoints.yVboData = None, None
self._yErrPoints.xVboData, self._yErrPoints.yVboData = None, None
self._attribs[0].vbo.discard()
self._attribs = None
# curves ######################################################################
def _proxyProperty(*componentsAttributes):
"""Create a property to access an attribute of attribute(s).
Useful for composition.
Supports multiple components this way:
getter returns the first found, setter sets all
"""
def getter(self):
for compName, attrName in componentsAttributes:
try:
component = getattr(self, compName)
except AttributeError:
pass
else:
return getattr(component, attrName)
def setter(self, value):
for compName, attrName in componentsAttributes:
component = getattr(self, compName)
setattr(component, attrName, value)
return property(getter, setter)
class GLPlotCurve2D(object):
def __init__(self, xData, yData, colorData=None,
xError=None, yError=None,
lineStyle=None, lineColor=None,
lineWidth=None, lineDashPeriod=None,
marker=None, markerColor=None, markerSize=None,
fillColor=None):
self._isXLog = False
self._isYLog = False
self.xData, self.yData, self.colorData = xData, yData, colorData
if fillColor is not None:
self.fill = _Fill2D(color=fillColor)
else:
self.fill = None
# Compute x bounds
if xError is None:
result = min_max(xData, min_positive=True)
self.xMin = result.minimum
self.xMinPos = result.min_positive
self.xMax = result.maximum
else:
# Takes the error into account
if hasattr(xError, 'shape') and len(xError.shape) == 2:
xErrorPlus, xErrorMinus = xError[0], xError[1]
else:
xErrorPlus, xErrorMinus = xError, xError
result = min_max(xData - xErrorMinus, min_positive=True)
self.xMin = result.minimum
self.xMinPos = result.min_positive
self.xMax = (xData + xErrorPlus).max()
# Compute y bounds
if yError is None:
result = min_max(yData, min_positive=True)
self.yMin = result.minimum
self.yMinPos = result.min_positive
self.yMax = result.maximum
else:
# Takes the error into account
if hasattr(yError, 'shape') and len(yError.shape) == 2:
yErrorPlus, yErrorMinus = yError[0], yError[1]
else:
yErrorPlus, yErrorMinus = yError, yError
result = min_max(yData - yErrorMinus, min_positive=True)
self.yMin = result.minimum
self.yMinPos = result.min_positive
self.yMax = (yData + yErrorPlus).max()
self._errorBars = _ErrorBars(xData, yData, xError, yError,
self.xMin, self.yMin)
kwargs = {'style': lineStyle}
if lineColor is not None:
kwargs['color'] = lineColor
if lineWidth is not None:
kwargs['width'] = lineWidth
if lineDashPeriod is not None:
kwargs['dashPeriod'] = lineDashPeriod
self.lines = _Lines2D(**kwargs)
kwargs = {'marker': marker}
if markerColor is not None:
kwargs['color'] = markerColor
if markerSize is not None:
kwargs['size'] = markerSize
self.points = _Points2D(**kwargs)
xVboData = _proxyProperty(('lines', 'xVboData'), ('points', 'xVboData'))
yVboData = _proxyProperty(('lines', 'yVboData'), ('points', 'yVboData'))
colorVboData = _proxyProperty(('lines', 'colorVboData'),
('points', 'colorVboData'))
useColorVboData = _proxyProperty(('lines', 'useColorVboData'),
('points', 'useColorVboData'))
distVboData = _proxyProperty(('lines', 'distVboData'))
lineStyle = _proxyProperty(('lines', 'style'))
lineColor = _proxyProperty(('lines', 'color'))
lineWidth = _proxyProperty(('lines', 'width'))
lineDashPeriod = _proxyProperty(('lines', 'dashPeriod'))
marker = _proxyProperty(('points', 'marker'))
markerColor = _proxyProperty(('points', 'color'))
markerSize = _proxyProperty(('points', 'size'))
@classmethod
def init(cls):
_Lines2D.init()
_Points2D.init()
@staticmethod
def _logFilterData(x, y, color=None, xLog=False, yLog=False):
# Copied from Plot.py
if xLog and yLog:
idx = numpy.nonzero((x > 0) & (y > 0))[0]
x = numpy.take(x, idx)
y = numpy.take(y, idx)
elif yLog:
idx = numpy.nonzero(y > 0)[0]
x = numpy.take(x, idx)
y = numpy.take(y, idx)
elif xLog:
idx = numpy.nonzero(x > 0)[0]
x = numpy.take(x, idx)
y = numpy.take(y, idx)
else:
idx = None
if idx is not None and isinstance(color, numpy.ndarray):
colors = numpy.zeros((x.size, 4), color.dtype)
colors[:, 0] = color[idx, 0]
colors[:, 1] = color[idx, 1]
colors[:, 2] = color[idx, 2]
colors[:, 3] = color[idx, 3]
else:
colors = color
return x, y, colors
def prepare(self, isXLog, isYLog):
# init only supports updating isXLog, isYLog
xData, yData, colorData = self.xData, self.yData, self.colorData
if self._isXLog != isXLog or self._isYLog != isYLog:
# Log state has changed
self._isXLog, self._isYLog = isXLog, isYLog
# Check if data <= 0. with log scale
if (isXLog and self.xMin <= 0.) or (isYLog and self.yMin <= 0.):
# Filtering data is needed
xData, yData, colorData = self._logFilterData(
self.xData, self.yData, self.colorData,
self._isXLog, self._isYLog)
self.discard() # discard existing VBOs
if self.xVboData is None:
xAttrib, yAttrib, cAttrib, dAttrib = None, None, None, None
if self.lineStyle in (DASHED, DASHDOT, DOTTED):
dists = _distancesFromArrays(xData, yData)
if self.colorData is None:
xAttrib, yAttrib, dAttrib = vertexBuffer(
(xData, yData, dists),
prefix=(1, 1, 0), suffix=(1, 1, 0))
else:
xAttrib, yAttrib, cAttrib, dAttrib = vertexBuffer(
(xData, yData, colorData, dists),
prefix=(1, 1, 0, 0), suffix=(1, 1, 0, 0))
elif self.colorData is None:
xAttrib, yAttrib = vertexBuffer(
(xData, yData), prefix=(1, 1), suffix=(1, 1))
else:
xAttrib, yAttrib, cAttrib = vertexBuffer(
(xData, yData, colorData), prefix=(1, 1, 0))
# Shrink VBO
self.xVboData = xAttrib.copy()
self.xVboData.size -= 2
self.xVboData.offset += xAttrib.itemsize
self.yVboData = yAttrib.copy()
self.yVboData.size -= 2
self.yVboData.offset += yAttrib.itemsize
if cAttrib is not None and colorData.dtype.kind == 'u':
cAttrib.normalization = True # Normalize uint to [0, 1]
self.colorVboData = cAttrib
self.useColorVboData = cAttrib is not None
self.distVboData = dAttrib
if self.fill is not None:
xData = xData.reshape(xData.size, 1)
zero = numpy.array((1e-32,), dtype=self.yData.dtype)
# Add one point before data: (x0, 0.)
xAttrib.vbo.update(xData[0], xAttrib.offset,
xData[0].itemsize)
yAttrib.vbo.update(zero, yAttrib.offset, zero.itemsize)
# Add one point after data: (xN, 0.)
xAttrib.vbo.update(xData[-1],
xAttrib.offset +
(xAttrib.size - 1) * xAttrib.itemsize,
xData[-1].itemsize)
yAttrib.vbo.update(zero,
yAttrib.offset +
(yAttrib.size - 1) * yAttrib.itemsize,
zero.itemsize)
self.fill.xFillVboData = xAttrib
self.fill.yFillVboData = yAttrib
self.fill.xMin, self.fill.yMin = self.xMin, self.yMin
self.fill.xMax, self.fill.yMax = self.xMax, self.yMax
self._errorBars.prepare(isXLog, isYLog)
def render(self, matrix, isXLog, isYLog):
self.prepare(isXLog, isYLog)
if self.fill is not None:
self.fill.render(matrix, isXLog, isYLog)
self._errorBars.render(matrix, isXLog, isYLog)
self.lines.render(matrix, isXLog, isYLog)
self.points.render(matrix, isXLog, isYLog)
def discard(self):
if self.xVboData is not None:
self.xVboData.vbo.discard()
self.xVboData = None
self.yVboData = None
self.colorVboData = None
self.distVboData = None
self._errorBars.discard()
def pick(self, xPickMin, yPickMin, xPickMax, yPickMax):
"""Perform picking on the curve according to its rendering.
The picking area is [xPickMin, xPickMax], [yPickMin, yPickMax].
In case a segment between 2 points with indices i, i+1 is picked,
only its lower index end point (i.e., i) is added to the result.
In case an end point with index i is picked it is added to the result,
and the segment [i-1, i] is not tested for picking.
:return: The indices of the picked data
:rtype: list of int
"""
if (self.marker is None and self.lineStyle is None) or \
self.xMin > xPickMax or xPickMin > self.xMax or \
self.yMin > yPickMax or yPickMin > self.yMax:
# Note: With log scale the bounding box is too large if
# some data <= 0.
return None
elif self.lineStyle is not None:
# Using Cohen-Sutherland algorithm for line clipping
codes = ((self.yData > yPickMax) << 3) | \
((self.yData < yPickMin) << 2) | \
((self.xData > xPickMax) << 1) | \
(self.xData < xPickMin)
# Add all points that are inside the picking area
indices = numpy.nonzero(codes == 0)[0].tolist()
# Segment that might cross the area with no end point inside it
segToTestIdx = numpy.nonzero((codes[:-1] != 0) &
(codes[1:] != 0) &
((codes[:-1] & codes[1:]) == 0))[0]
TOP, BOTTOM, RIGHT, LEFT = (1 << 3), (1 << 2), (1 << 1), (1 << 0)
for index in segToTestIdx:
if index not in indices:
x0, y0 = self.xData[index], self.yData[index]
x1, y1 = self.xData[index + 1], self.yData[index + 1]
code1 = codes[index + 1]
# check for crossing with horizontal bounds
# y0 == y1 is a never event:
# => pt0 and pt1 in same vertical area are not in segToTest
if code1 & TOP:
x = x0 + (x1 - x0) * (yPickMax - y0) / (y1 - y0)
elif code1 & BOTTOM:
x = x0 + (x1 - x0) * (yPickMin - y0) / (y1 - y0)
else:
x = None # No horizontal bounds intersection test
if x is not None and xPickMin <= x <= xPickMax:
# Intersection
indices.append(index)
else:
# check for crossing with vertical bounds
# x0 == x1 is a never event (see remark for y)
if code1 & RIGHT:
y = y0 + (y1 - y0) * (xPickMax - x0) / (x1 - x0)
elif code1 & LEFT:
y = y0 + (y1 - y0) * (xPickMin - x0) / (x1 - x0)
else:
y = None # No vertical bounds intersection test
if y is not None and yPickMin <= y <= yPickMax:
# Intersection
indices.append(index)
indices.sort()
else:
indices = numpy.nonzero((self.xData >= xPickMin) &
(self.xData <= xPickMax) &
(self.yData >= yPickMin) &
(self.yData <= yPickMax))[0].tolist()
return indices
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