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Snap_Utilities_Line: support 3d view clip planes 

Elements that are not visible due to clip planes are ignored in the
main operation.
This commit is contained in:
Germano Cavalcante 2021-08-16 13:46:11 -03:00
parent 21dc384d15
commit 8c8df3e369
3 changed files with 25 additions and 22 deletions
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4
mesh_snap_utilities_line/__init__.py
View File

@ -21,8 +21,8 @@
bl_info = {
"name": "Snap_Utilities_Line",
"author": "Germano Cavalcante",
"version": (6, 9, 23),
"blender": (2, 93, 0),
"version": (6, 9, 3),
"blender": (3, 0, 0),
"location": "View3D > TOOLS > Line Tool",
"description": "Extends Blender Snap controls",
"doc_url" : "https://blenderartists.org/t/cad-snap-utilities",

39
mesh_snap_utilities_line/snap_context_l/mesh_drawing.py
View File

@ -211,12 +211,13 @@ class GPU_Indices_Mesh():
atexit.unregister(cls.end_opengl)
atexit.register(cls.end_opengl)
cls.shader = gpu.types.GPUShader(load_shader("ID_color_vert.glsl"),
load_shader("ID_color_frag.glsl"),)
#cls.unif_use_clip_planes =
#cls.shader.uniform_from_name('use_clip_planes')
#cls.unif_clip_plane = cls.shader.uniform_from_name('clip_plane')
cls.shader = gpu.types.GPUShader(
load_shader("ID_color_vert.glsl"),
load_shader("ID_color_frag.glsl"),
defines="#define USE_CLIP_PLANES\n")
cls.unif_offset = cls.shader.uniform_from_name('offset')
cls.use_clip_planes = False
def __init__(self, depsgraph, obj, draw_tris, draw_edges, draw_verts):
@ -332,8 +333,12 @@ class GPU_Indices_Mesh():
gpu.matrix.push()
gpu.matrix.push_projection()
gpu.matrix.multiply_matrix(ob_mat)
self.shader.bind()
if GPU_Indices_Mesh.use_clip_planes:
self.shader.uniform_float("ModelMatrix", ob_mat)
if self.draw_tris:
self.shader.bind()
self.shader.uniform_int("offset", (index_offset,))
self.batch_tris.draw(self.shader)
index_offset += len(self.tri_verts)
@ -359,7 +364,6 @@ class GPU_Indices_Mesh():
gpu.matrix.load_projection_matrix(winmat)
if self.draw_edges:
self.shader.bind()
self.shader.uniform_int("offset", (index_offset,))
#bgl.glLineWidth(3.0)
self.batch_edges.draw(self.shader)
@ -367,7 +371,6 @@ class GPU_Indices_Mesh():
index_offset += len(self.edge_verts)
if self.draw_verts:
self.shader.bind()
self.shader.uniform_int("offset", (index_offset,))
self.batch_lverts.draw(self.shader)
@ -427,17 +430,17 @@ def gpu_Indices_restore_state():
def gpu_Indices_use_clip_planes(rv3d, value):
pass #TODO
#if rv3d.use_clip_planes:
#planes = bgl.Buffer(bgl.GL_FLOAT, (6, 4), rv3d.clip_planes)
GPU_Indices_Mesh.init_opengl()
shader = GPU_Indices_Mesh.shader
shader.bind()
if value and rv3d.use_clip_planes:
GPU_Indices_Mesh.use_clip_planes = True
planes = gpu.types.Buffer('FLOAT', (6, 4), rv3d.clip_planes)
shader.uniform_vector_float(shader.uniform_from_name("clip_plane"), planes, 4, 4)
else:
GPU_Indices_Mesh.use_clip_planes = False
#_store_current_shader_state(PreviousGLState)
#GPU_Indices_Mesh.init_opengl()
#bgl.glUseProgram(GPU_Indices_Mesh.shader.program)
#bgl.glUniform1i(GPU_Indices_Mesh.unif_use_clip_planes, value)
shader.uniform_bool("use_clip_planes", (GPU_Indices_Mesh.use_clip_planes,))
#bgl.glUniform4fv(GPU_Indices_Mesh.unif_clip_plane, 4, planes)
#_restore_shader_state(PreviousGLState)
def gpu_Indices_mesh_cache_clear():
GPU_Indices_Mesh._Hash.clear()

4
mesh_snap_utilities_line/snap_context_l/shaders/ID_color_vert.glsl
View File

@ -1,7 +1,7 @@
uniform mat4 ModelViewProjectionMatrix;
#ifdef USE_CLIP_PLANES
uniform mat4 ModelViewMatrix;
uniform mat4 ModelMatrix;
uniform bool use_clip_planes;
uniform vec4 clip_plane[4];
out vec4 clip_distance;
@ -13,7 +13,7 @@ void main()
{
#ifdef USE_CLIP_PLANES
if (use_clip_planes) {
vec4 g_pos = ModelViewMatrix * vec4(pos, 1.0);
vec4 g_pos = ModelMatrix * vec4(pos, 1.0);
for (int i = 0; i != 4; i++) {
clip_distance[i] = dot(clip_plane[i], g_pos);