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Handle render-range in shader.

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Instead of re-uploading the mesh each time the range changes, handle the range in the shaders with the new draw-range parameters. This does however, mean the range has to be in vertices, not in elements. This necessitates some changes to the simulation-view, and some added bits deeper in the base code. Mainly, since each time the type of a line changes, there is an extra vertex, there needs to be a type-change count available to get from 'paths' to range indices.
This commit is contained in:
Remco Burema 2021-07-25 22:26:59 +02:00
parent 87d3f6fd22
commit 96ca3b1417
6 changed files with 66 additions and 8 deletions
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11
plugins/SimulationView/SimulationPass.py
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@ -138,6 +138,7 @@ class SimulationPass(RenderPass):
if self._layer_view._current_layer_num > -1 and ((not self._layer_view._only_show_top_layers) or (not self._layer_view.getCompatibilityMode())):
start = 0
end = 0
current_polygon_offset = 0
element_counts = layer_data.getElementCounts()
for layer in sorted(element_counts.keys()):
# In the current layer, we show just the indicated paths
@ -151,18 +152,20 @@ class SimulationPass(RenderPass):
if index >= polygon.data.size // 3 - offset:
index -= polygon.data.size // 3 - offset
offset = 1 # This is to avoid the first point when there is more than one polygon, since has the same value as the last point in the previous polygon
current_polygon_offset += 1
continue
# The head position is calculated and translated
head_position = Vector(polygon.data[index+offset][0], polygon.data[index+offset][1], polygon.data[index+offset][2]) + node.getWorldPosition()
break
break
if self._layer_view._minimum_layer_num > layer:
start += element_counts[layer]
end += element_counts[layer]
end += layer_data.getLayer(layer).lineMeshVertexCount()
if layer < self._layer_view._minimum_layer_num:
start = end
# Calculate the range of paths in the last layer
type_change_count = layer_data.getLayer(self._layer_view._current_layer_num).lineMeshCumulativeTypeChangeCount(max(self._layer_view._current_path_num - 1, 0))
current_layer_start = end
current_layer_end = end + self._layer_view._current_path_num * 2 # Because each point is used twice
current_layer_end = current_layer_start + self._layer_view._current_path_num + current_polygon_offset + type_change_count
# This uses glDrawRangeElements internally to only draw a certain range of lines.
# All the layers but the current selected layer are rendered first