### BEGIN GPL LICENSE BLOCK #####
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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# ##### END GPL LICENSE BLOCK #####
# -*- coding: utf-8 -*-
import bpy
import gpu
import bgl
from gpu_extras.batch import batch_for_shader
from mathutils import Vector
from math import sqrt, pi, atan2, asin
vertex_shader = '''
uniform mat4 ModelViewProjectionMatrix;
/* Keep in sync with intern/opencolorio/gpu_shader_display_transform_vertex.glsl */
in vec2 texCoord;
in vec2 pos;
out vec2 texCoord_interp;
void main()
{
gl_Position = ModelViewProjectionMatrix * vec4(pos.xy, 0.0f, 1.0f);
gl_Position.z = 1.0;
texCoord_interp = texCoord;
}'''
fragment_shader = '''
in vec2 texCoord_interp;
out vec4 fragColor;
uniform sampler2D image;
uniform float exposure;
void main()
{
fragColor = texture(image, texCoord_interp) * exposure;
}'''
# shader = gpu.types.GPUShader(vertex_shader, fragment_shader)
def draw_callback_px(self, context):
nt = bpy.context.scene.world.node_tree.nodes
env_tex_node = nt.get(bpy.context.scene.sun_pos_properties.hdr_texture)
image = env_tex_node.image
if self.area != context.area:
return
if image.gl_load():
raise Exception()
bottom = 0
top = context.area.height
right = context.area.width
position = Vector((right, top)) / 2 + self.offset
scale = Vector((context.area.width, context.area.width / 2)) * self.scale
shader = gpu.types.GPUShader(vertex_shader, fragment_shader)
coords = ((-0.5, -0.5), (0.5, -0.5), (0.5, 0.5), (-0.5, 0.5))
uv_coords = ((0, 0), (1, 0), (1, 1), (0, 1))
batch = batch_for_shader(shader, 'TRI_FAN',
{"pos" : coords,
"texCoord" : uv_coords})
bgl.glActiveTexture(bgl.GL_TEXTURE0)
bgl.glBindTexture(bgl.GL_TEXTURE_2D, image.bindcode)
with gpu.matrix.push_pop():
gpu.matrix.translate(position)
gpu.matrix.scale(scale)
shader.bind()
shader.uniform_int("image", 0)
shader.uniform_float("exposure", self.exposure)
batch.draw(shader)
# Crosshair
# vertical
coords = ((self.mouse_position[0], bottom), (self.mouse_position[0], top))
colors = ((1,)*4,)*2
shader = gpu.shader.from_builtin('2D_FLAT_COLOR')
batch = batch_for_shader(shader, 'LINES',
{"pos": coords, "color": colors})
shader.bind()
batch.draw(shader)
# horizontal
if bottom <= self.mouse_position[1] <= top:
coords = ((0, self.mouse_position[1]), (context.area.width, self.mouse_position[1]))
batch = batch_for_shader(shader, 'LINES',
{"pos": coords, "color": colors})
shader.bind()
batch.draw(shader)
class SUNPOS_OT_ShowHdr(bpy.types.Operator):
"""Tooltip"""
bl_idname = "world.sunpos_show_hdr"
bl_label = "Sync Sun to Texture"
exposure = 1.0
def update(self, context, event):
sun_props = context.scene.sun_pos_properties
mouse_position_abs = Vector((event.mouse_x, event.mouse_y))
# Get current area
for area in context.screen.areas:
# Compare absolute mouse position to area bounds
if (area.x < mouse_position_abs.x < area.x + area.width
and area.y < mouse_position_abs.y < area.y + area.height):
self.area = area
if area.type == 'VIEW_3D':
# Redraw all areas
area.tag_redraw()
if self.area.type == 'VIEW_3D':
self.top = self.area.height
self.right = self.area.width
nt = context.scene.world.node_tree.nodes
env_tex = nt.get(sun_props.hdr_texture)
# Mouse position relative to window
self.mouse_position = Vector((mouse_position_abs.x - self.area.x,
mouse_position_abs.y - self.area.y))
self.selected_point = (self.mouse_position - self.offset - Vector((self.right, self.top))/2) / self.scale
u = self.selected_point.x / self.area.width + 0.5
v = (self.selected_point.y) / (self.area.width / 2) + 0.5
# Set elevation and azimuth from selected point
if env_tex.projection == 'EQUIRECTANGULAR':
el = v * pi - pi/2
az = u * pi*2 - pi/2 + env_tex.texture_mapping.rotation.z
# Clamp elevation
el = max(el, -pi/2)
el = min(el, pi/2)
sun_props.hdr_elevation = el
sun_props.hdr_azimuth = az
elif env_tex.projection == 'MIRROR_BALL':
# Formula from intern/cycles/kernel/kernel_projection.h
# Point on sphere
dir = Vector()
# Normalize to -1, 1
dir.x = 2.0 * u - 1.0
dir.z = 2.0 * v - 1.0
# Outside bounds
if (dir.x * dir.x + dir.z * dir.z > 1.0):
dir = Vector()
else:
dir.y = -sqrt(max(1.0 - dir.x * dir.x - dir.z * dir.z, 0.0))
# Reflection
i = Vector((0.0, -1.0, 0.0))
dir = 2.0 * dir.dot(i) * dir - i
# Convert vector to euler
el = asin(dir.z)
az = atan2(dir.x, dir.y) + env_tex.texture_mapping.rotation.z
sun_props.hdr_elevation = el
sun_props.hdr_azimuth = az
else:
self.report({'ERROR'}, 'Unknown projection')
return {'CANCELLED'}
def pan(self, context, event):
self.offset += Vector((event.mouse_region_x - self.mouse_prev_x,
event.mouse_region_y - self.mouse_prev_y))
self.mouse_prev_x, self.mouse_prev_y = event.mouse_region_x, event.mouse_region_y
def modal(self, context, event):
self.area.tag_redraw()
if event.type == 'MOUSEMOVE':
if self.is_panning:
self.pan(context, event)
self.update(context, event)
# Confirm
elif event.type in {'LEFTMOUSE', 'RET'}:
bpy.types.SpaceView3D.draw_handler_remove(self._handle, 'WINDOW')
for area in context.screen.areas:
area.tag_redraw()
# Bind the environment texture to the sun
context.scene.sun_pos_properties.bind_to_sun = True
context.workspace.status_text_set(None)
return {'FINISHED'}
# Cancel
elif event.type in {'RIGHTMOUSE', 'ESC'}:
bpy.types.SpaceView3D.draw_handler_remove(self._handle, 'WINDOW')
for area in context.screen.areas:
area.tag_redraw()
# Reset previous values
context.scene.sun_pos_properties.hdr_elevation = self.initial_elevation
context.scene.sun_pos_properties.hdr_azimuth = self.initial_azimuth
context.workspace.status_text_set(None)
return {'CANCELLED'}
# Set exposure or zoom
elif event.type == 'WHEELUPMOUSE':
# Exposure
if event.ctrl:
self.exposure *= 1.1
# Zoom
else:
self.scale *= 1.1
self.offset -= (self.mouse_position - (Vector((self.right, self.top)) / 2 + self.offset)) / 10.0
self.update(context, event)
elif event.type == 'WHEELDOWNMOUSE':
# Exposure
if event.ctrl:
self.exposure /= 1.1
# Zoom
else:
self.scale /= 1.1
self.offset += (self.mouse_position - (Vector((self.right, self.top)) / 2 + self.offset)) / 11.0
self.update(context, event)
# Toggle pan
elif event.type == 'MIDDLEMOUSE':
if event.value == 'PRESS':
self.mouse_prev_x, self.mouse_prev_y = event.mouse_region_x, event.mouse_region_y
self.is_panning = True
elif event.value == 'RELEASE':
self.is_panning = False
else:
return {'PASS_THROUGH'}
return {'RUNNING_MODAL'}
def invoke(self, context, event):
self.is_panning = False
self.mouse_prev_x = 0.0
self.mouse_prev_y = 0.0
self.offset = Vector((0.0, 0.0))
self.scale = 1.0
# Get at least one 3D View
area_3d = None
for a in context.screen.areas:
if a.type == 'VIEW_3D':
area_3d = a
break
if area_3d is None:
self.report({'ERROR'}, 'Could not find 3D View')
return {'CANCELLED'}
self.area = context.area
self.mouse_position = event.mouse_region_x, event.mouse_region_y
self.initial_elevation = context.scene.sun_pos_properties.hdr_elevation
self.initial_azimuth = context.scene.sun_pos_properties.hdr_azimuth
context.workspace.status_text_set("Enter/LMB: confirm, Esc/RMB: cancel, MMB: pan, mouse wheel: zoom, Ctrl + mouse wheel: set exposure")
self._handle = bpy.types.SpaceView3D.draw_handler_add(draw_callback_px,
(self, context), 'WINDOW', 'POST_PIXEL')
context.window_manager.modal_handler_add(self)
return {'RUNNING_MODAL'}