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New text:
Copyright 2013 Pixar
Licensed under the Apache License, Version 2.0 (the "Apache License")
with the following modification; you may not use this file except in
compliance with the Apache License and the following modification to it:
Section 6. Trademarks. is deleted and replaced with:
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor
and its affiliates, except as required to comply with Section 4(c) of
the License and to reproduce the content of the NOTICE file.
You may obtain a copy of the Apache License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the Apache License with the above modification is
distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the Apache License for the specific
language governing permissions and limitations under the Apache License.
577 lines
18 KiB
GLSL
577 lines
18 KiB
GLSL
//
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// Copyright 2013 Pixar
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//
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// Licensed under the Apache License, Version 2.0 (the "Apache License")
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// with the following modification; you may not use this file except in
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// compliance with the Apache License and the following modification to it:
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// Section 6. Trademarks. is deleted and replaced with:
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//
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// 6. Trademarks. This License does not grant permission to use the trade
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// names, trademarks, service marks, or product names of the Licensor
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// and its affiliates, except as required to comply with Section 4(c) of
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// the License and to reproduce the content of the NOTICE file.
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//
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// You may obtain a copy of the Apache License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the Apache License with the above modification is
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// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the Apache License for the specific
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// language governing permissions and limitations under the Apache License.
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//
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#if defined(OSD_TRANSITION_PATTERN00) || defined(OSD_TRANSITION_PATTERN01) || defined(OSD_TRANSITION_PATTERN02) || defined(OSD_TRANSITION_PATTERN10) || defined(OSD_TRANSITION_PATTERN11) || defined(OSD_TRANSITION_PATTERN12) || defined(OSD_TRANSITION_PATTERN13) || defined(OSD_TRANSITION_PATTERN21) || defined(OSD_TRANSITION_PATTERN22) || defined(OSD_TRANSITION_PATTERN23)
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#define OSD_TRANSITION_TRIANGLE_SUBPATCH
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#else
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#undef OSD_TRANSITION_TRIANGLE_SUBPATCH
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#endif
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//----------------------------------------------------------
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// Patches.TessControlTransition
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//----------------------------------------------------------
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#ifdef OSD_PATCH_TESS_CONTROL_BSPLINE_SHADER
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void
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SetTransitionTessLevels(vec3 cp[OSD_PATCH_INPUT_SIZE], int patchLevel)
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{
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#ifdef OSD_ENABLE_SCREENSPACE_TESSELLATION
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// These tables map the 9, 12, or 16 input control points onto the
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// canonical 16 control points for a regular patch.
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#if defined OSD_PATCH_BOUNDARY
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const int p[16] = int[]( 0, 1, 2, 3, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 );
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#elif defined OSD_PATCH_CORNER
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const int p[16] = int[]( 0, 1, 2, 2, 0, 1, 2, 2, 3, 4, 5, 5, 6, 7, 8, 8 );
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#else
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const int p[16] = int[]( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
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#endif
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#if OSD_TRANSITION_ROTATE == 0
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const int r[16] = int[]( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
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#elif OSD_TRANSITION_ROTATE == 1
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const int r[16] = int[]( 12, 8, 4, 0, 13, 9, 5, 1, 14, 10, 6, 2, 15, 11, 7, 3 );
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#elif OSD_TRANSITION_ROTATE == 2
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const int r[16] = int[]( 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 );
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#elif OSD_TRANSITION_ROTATE == 3
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const int r[16] = int[]( 3, 7, 11, 15, 2, 6, 10, 14, 1, 5, 9, 13, 0, 4, 8, 12 );
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#endif
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// Expand and rotate control points using remapping tables above
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vec3 pv0 = cp[p[r[0]]];
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vec3 pv1 = cp[p[r[1]]];
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vec3 pv2 = cp[p[r[2]]];
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vec3 pv3 = cp[p[r[3]]];
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vec3 pv4 = cp[p[r[4]]];
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vec3 pv5 = cp[p[r[5]]];
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vec3 pv6 = cp[p[r[6]]];
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vec3 pv7 = cp[p[r[7]]];
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vec3 pv8 = cp[p[r[8]]];
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vec3 pv9 = cp[p[r[9]]];
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vec3 pv10 = cp[p[r[10]]];
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vec3 pv11 = cp[p[r[11]]];
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vec3 pv12 = cp[p[r[12]]];
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vec3 pv13 = cp[p[r[13]]];
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vec3 pv14 = cp[p[r[14]]];
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vec3 pv15 = cp[p[r[15]]];
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// Each edge of a transition patch is adjacent to one or two
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// patches at the next refined level of subdivision.
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// Compute the corresponding vertex-vertex and edge-vertex refined
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// points along the edges of the patch using Catmull-Clark subdivision
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// stencil weights.
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// For simplicity, we let the optimizer discard unused computation.
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vec3 vv0 = (pv0 + pv2 + pv8 + pv10) * 0.015625 +
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(pv1 + pv4 + pv6 + pv9) * 0.09375 + pv5 * 0.5625;
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vec3 ev01 = (pv1 + pv2 + pv9 + pv10) * 0.0625 + (pv5 + pv6) * 0.375;
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vec3 vv1 = (pv1 + pv3 + pv9 + pv11) * 0.015625 +
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(pv2 + pv5 + pv7 + pv10) * 0.09375 + pv6 * 0.5625;
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vec3 ev12 = (pv5 + pv7 + pv9 + pv11) * 0.0625 + (pv6 + pv10) * 0.375;
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vec3 vv2 = (pv5 + pv7 + pv13 + pv15) * 0.015625 +
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(pv6 + pv9 + pv11 + pv14) * 0.09375 + pv10 * 0.5625;
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vec3 ev23 = (pv5 + pv6 + pv13 + pv14) * 0.0625 + (pv9 + pv10) * 0.375;
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vec3 vv3 = (pv4 + pv6 + pv12 + pv14) * 0.015625 +
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(pv5 + pv8 + pv10 + pv13) * 0.09375 + pv9 * 0.5625;
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vec3 ev30 = (pv4 + pv6 + pv8 + pv10) * 0.0625 + (pv5 + pv9) * 0.375;
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// The vertices along boundaries and at corners are refined specially.
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#if defined OSD_PATCH_BOUNDARY
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#if OSD_TRANSITION_ROTATE == 0
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vv0 = (pv4 + pv6) * 0.125 + pv5 * 0.75;
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vv1 = (pv5 + pv7) * 0.125 + pv6 * 0.75;
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#elif OSD_TRANSITION_ROTATE == 1
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vv1 = (pv2 + pv10) * 0.125 + pv6 * 0.75;
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vv2 = (pv6 + pv14) * 0.125 + pv10 * 0.75;
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#elif OSD_TRANSITION_ROTATE == 2
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vv2 = (pv9 + pv11) * 0.125 + pv10 * 0.75;
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vv3 = (pv8 + pv10) * 0.125 + pv9 * 0.75;
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#elif OSD_TRANSITION_ROTATE == 3
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vv3 = (pv5 + pv13) * 0.125 + pv9 * 0.75;
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vv0 = (pv1 + pv9) * 0.125 + pv5 * 0.75;
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#endif
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#elif defined OSD_PATCH_CORNER
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#if OSD_TRANSITION_ROTATE == 0
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vv0 = (pv4 + pv6) * 0.125 + pv5 * 0.75;
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vv1 = pv6;
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vv2 = (pv6 + pv14) * 0.125 + pv10 * 0.75;
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#elif OSD_TRANSITION_ROTATE == 1
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vv1 = (pv5 + pv7) * 0.125 + pv6 * 0.75;
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vv2 = pv10;
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vv3 = (pv8 + pv10) * 0.125 + pv9 * 0.75;
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#elif OSD_TRANSITION_ROTATE == 2
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vv2 = (pv6 + pv14) * 0.125 + pv10 * 0.75;
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vv3 = pv9;
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vv0 = (pv4 + pv6) * 0.125 + pv5 * 0.75;
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#elif OSD_TRANSITION_ROTATE == 3
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vv3 = (pv8 + pv10) * 0.125 + pv9 * 0.75;
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vv0 = pv5;
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vv1 = (pv5 + pv7) * 0.125 + pv6 * 0.75;
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#endif
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#endif
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#ifdef OSD_TRANSITION_PATTERN00
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gl_TessLevelOuter[0] = TessAdaptive(ev01, pv9) * 0.5;
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gl_TessLevelOuter[1] = TessAdaptive(ev01, pv10) * 0.5;
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gl_TessLevelOuter[2] = TessAdaptive(pv9, pv10);
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gl_TessLevelInner[0] =
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(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.5;
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#endif
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#ifdef OSD_TRANSITION_PATTERN01
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gl_TessLevelOuter[0] = TessAdaptive(ev01, vv1);
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gl_TessLevelOuter[1] = TessAdaptive(pv6, pv10);
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gl_TessLevelOuter[2] = TessAdaptive(ev01, pv10) * 0.5;
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gl_TessLevelInner[0] =
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(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.25;
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#endif
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#ifdef OSD_TRANSITION_PATTERN02
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gl_TessLevelOuter[0] = TessAdaptive(ev01, vv0);
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gl_TessLevelOuter[1] = TessAdaptive(ev01, pv9) * 0.5;
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gl_TessLevelOuter[2] = TessAdaptive(pv5, pv9);
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gl_TessLevelInner[0] =
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(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.25;
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#endif
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#ifdef OSD_TRANSITION_PATTERN10
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gl_TessLevelOuter[0] = TessAdaptive(pv6, pv10);
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gl_TessLevelOuter[1] = TessAdaptive(ev01, pv10);
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gl_TessLevelOuter[2] = TessAdaptive(ev01, vv1);
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gl_TessLevelInner[0] = (gl_TessLevelOuter[0] + gl_TessLevelOuter[1]) * 0.25;
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#endif
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#ifdef OSD_TRANSITION_PATTERN11
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gl_TessLevelOuter[0] = TessAdaptive(pv9, pv10);
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gl_TessLevelOuter[1] = TessAdaptive(ev30, vv3);
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gl_TessLevelOuter[2] = TessAdaptive(ev30, pv10);
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gl_TessLevelInner[0] = (gl_TessLevelOuter[0] + gl_TessLevelOuter[2]) * 0.25;
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#endif
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#ifdef OSD_TRANSITION_PATTERN12
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gl_TessLevelOuter[0] = TessAdaptive(ev30, vv0);
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gl_TessLevelOuter[1] = TessAdaptive(ev01, vv0);
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gl_TessLevelOuter[2] = TessAdaptive(ev01, ev30);
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gl_TessLevelInner[0] =
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(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.25;
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#endif
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#ifdef OSD_TRANSITION_PATTERN13
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gl_TessLevelOuter[0] = TessAdaptive(ev01, pv10);
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gl_TessLevelOuter[1] = TessAdaptive(ev30, pv10);
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gl_TessLevelOuter[2] = TessAdaptive(ev01, ev30);
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gl_TessLevelInner[0] =
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(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.25;
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#endif
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#ifdef OSD_TRANSITION_PATTERN20
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gl_TessLevelOuter[0] = TessAdaptive(pv5, pv6);
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gl_TessLevelOuter[1] = TessAdaptive(ev12, vv1);
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gl_TessLevelOuter[2] = TessAdaptive(ev12, ev30);
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gl_TessLevelOuter[3] = TessAdaptive(ev30, vv0);
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gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
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gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
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#endif
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#ifdef OSD_TRANSITION_PATTERN21
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gl_TessLevelOuter[0] = TessAdaptive(ev23, ev30) * 0.5;
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gl_TessLevelOuter[1] = TessAdaptive(ev23, vv3);
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gl_TessLevelOuter[2] = TessAdaptive(ev30, vv3);
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gl_TessLevelInner[0] = (gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.5;
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#endif
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#ifdef OSD_TRANSITION_PATTERN22
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gl_TessLevelOuter[0] = TessAdaptive(ev12, vv2);
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gl_TessLevelOuter[1] = TessAdaptive(ev23, vv2);
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gl_TessLevelOuter[2] = TessAdaptive(ev12, ev23) * 0.5;
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gl_TessLevelInner[0] = (gl_TessLevelOuter[0] + gl_TessLevelOuter[1]) * 0.5;
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#endif
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#ifdef OSD_TRANSITION_PATTERN23
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gl_TessLevelOuter[0] = TessAdaptive(ev12, ev30);
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gl_TessLevelOuter[1] = TessAdaptive(ev12, ev23) * 0.5;
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gl_TessLevelOuter[2] = TessAdaptive(ev23, ev30) * 0.5;
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gl_TessLevelInner[0] =
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(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.5;
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#endif
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#ifdef OSD_TRANSITION_PATTERN30
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gl_TessLevelOuter[0] = TessAdaptive(ev30, ev12) * 0.5;
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gl_TessLevelOuter[1] = TessAdaptive(ev30, vv0);
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gl_TessLevelOuter[2] = TessAdaptive(ev01, vv0);
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gl_TessLevelOuter[3] = TessAdaptive(ev01, ev23) * 0.5;
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gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
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gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
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#endif
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#ifdef OSD_TRANSITION_PATTERN31
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gl_TessLevelOuter[0] = TessAdaptive(ev01, ev23) * 0.5;
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gl_TessLevelOuter[1] = TessAdaptive(ev23, vv3);
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gl_TessLevelOuter[2] = TessAdaptive(ev30, vv3);
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gl_TessLevelOuter[3] = TessAdaptive(ev30, ev12) * 0.5;
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gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
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gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
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#endif
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#ifdef OSD_TRANSITION_PATTERN32
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gl_TessLevelOuter[0] = TessAdaptive(ev23, ev01) * 0.5;
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gl_TessLevelOuter[1] = TessAdaptive(ev01, vv1);
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gl_TessLevelOuter[2] = TessAdaptive(ev12, vv1);
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gl_TessLevelOuter[3] = TessAdaptive(ev12, ev30) * 0.5;
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gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
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gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
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#endif
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#ifdef OSD_TRANSITION_PATTERN33
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gl_TessLevelOuter[0] = TessAdaptive(ev12, ev30) * 0.5;
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gl_TessLevelOuter[1] = TessAdaptive(ev12, vv2);
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gl_TessLevelOuter[2] = TessAdaptive(ev23, vv2);
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gl_TessLevelOuter[3] = TessAdaptive(ev01, ev23) * 0.5;
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gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
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gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
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#endif
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#ifdef OSD_TRANSITION_PATTERN40
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gl_TessLevelOuter[0] = TessAdaptive(ev01, vv0);
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gl_TessLevelOuter[1] = TessAdaptive(ev01, ev23);
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gl_TessLevelOuter[2] = TessAdaptive(ev23, vv3);
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gl_TessLevelOuter[3] = TessAdaptive(pv5, pv9);
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gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
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gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
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#endif
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#ifdef OSD_TRANSITION_PATTERN41
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gl_TessLevelOuter[0] = TessAdaptive(ev01, vv1);
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gl_TessLevelOuter[1] = TessAdaptive(pv6, pv10);
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gl_TessLevelOuter[2] = TessAdaptive(ev23, vv2);
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gl_TessLevelOuter[3] = TessAdaptive(ev01, ev23);
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gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
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gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
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#endif
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#else // OSD_ENABLE_SCREENSPACE_TESSELLATION
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float TessAmount = GetTessLevel(patchLevel);
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#ifdef OSD_TRANSITION_PATTERN00
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float side = sqrt(1.25)*TessAmount;
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gl_TessLevelOuter[0] = side;
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gl_TessLevelOuter[1] = side;
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gl_TessLevelOuter[2] = TessAmount;
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gl_TessLevelInner[0] = TessAmount;
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#endif
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#ifdef OSD_TRANSITION_PATTERN01
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float side = sqrt(1.25)*TessAmount;
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gl_TessLevelOuter[0] = TessAmount/2.0;
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gl_TessLevelOuter[1] = TessAmount;
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gl_TessLevelOuter[2] = side;
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gl_TessLevelInner[0] = TessAmount/2.0;
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#endif
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#ifdef OSD_TRANSITION_PATTERN02
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float side = sqrt(1.25)*TessAmount;
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gl_TessLevelOuter[0] = TessAmount/2.0;
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gl_TessLevelOuter[1] = side;
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gl_TessLevelOuter[2] = TessAmount;
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gl_TessLevelInner[0] = TessAmount/2.0;
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#endif
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#ifdef OSD_TRANSITION_PATTERN10
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float side = sqrt(1.25) * TessAmount;
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gl_TessLevelOuter[0] = TessAmount;
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gl_TessLevelOuter[1] = side;
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gl_TessLevelOuter[2] = TessAmount/2.0;
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gl_TessLevelInner[0] = TessAmount/2;
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#endif
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#ifdef OSD_TRANSITION_PATTERN11
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float side = sqrt(1.25) * TessAmount;
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gl_TessLevelOuter[0] = TessAmount;
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gl_TessLevelOuter[1] = TessAmount/2.0;
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gl_TessLevelOuter[2] = side;
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gl_TessLevelInner[0] = TessAmount/2;
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#endif
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#ifdef OSD_TRANSITION_PATTERN12
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float side = sqrt(0.125) * TessAmount;
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gl_TessLevelOuter[0] = TessAmount/2.0;
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gl_TessLevelOuter[1] = TessAmount/2.0;
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gl_TessLevelOuter[2] = side;
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gl_TessLevelInner[0] = TessAmount/2;
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#endif
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#ifdef OSD_TRANSITION_PATTERN13
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float side1 = sqrt(1.25) * TessAmount;
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float side2 = sqrt(0.125) * TessAmount;
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gl_TessLevelOuter[0] = side1;
|
|
gl_TessLevelOuter[1] = side1;
|
|
gl_TessLevelOuter[2] = side2;
|
|
|
|
gl_TessLevelInner[0] = TessAmount/2.0*1.414;
|
|
#endif
|
|
|
|
|
|
#ifdef OSD_TRANSITION_PATTERN20
|
|
gl_TessLevelOuter[0] = TessAmount;
|
|
gl_TessLevelOuter[1] = TessAmount/2.0;
|
|
gl_TessLevelOuter[2] = TessAmount;
|
|
gl_TessLevelOuter[3] = TessAmount/2.0;
|
|
|
|
gl_TessLevelInner[0] = TessAmount/2.0;
|
|
gl_TessLevelInner[1] = TessAmount;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN21
|
|
float side = sqrt(0.125) * TessAmount;
|
|
gl_TessLevelOuter[0] = side;
|
|
gl_TessLevelOuter[1] = TessAmount/2.0;
|
|
gl_TessLevelOuter[2] = TessAmount/2.0;
|
|
|
|
gl_TessLevelInner[0] = TessAmount/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN22
|
|
float side = sqrt(0.125) * TessAmount;
|
|
gl_TessLevelOuter[0] = TessAmount/2.0;
|
|
gl_TessLevelOuter[1] = TessAmount/2.0;
|
|
gl_TessLevelOuter[2] = side;
|
|
|
|
gl_TessLevelInner[0] = TessAmount/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN23
|
|
float side = sqrt(0.125) * TessAmount;
|
|
gl_TessLevelOuter[0] = TessAmount;
|
|
gl_TessLevelOuter[1] = side;
|
|
gl_TessLevelOuter[2] = side;
|
|
|
|
gl_TessLevelInner[0] = TessAmount/2.0;
|
|
#endif
|
|
|
|
|
|
#ifdef OSD_TRANSITION_PATTERN30
|
|
gl_TessLevelOuter[0] = gl_TessLevelOuter[1] =
|
|
gl_TessLevelOuter[2] = gl_TessLevelOuter[3] = TessAmount/2.0;
|
|
gl_TessLevelInner[0] = gl_TessLevelInner[1] = TessAmount/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN31
|
|
gl_TessLevelOuter[0] = gl_TessLevelOuter[1] =
|
|
gl_TessLevelOuter[2] = gl_TessLevelOuter[3] = TessAmount/2.0;
|
|
gl_TessLevelInner[0] = gl_TessLevelInner[1] = TessAmount/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN32
|
|
gl_TessLevelOuter[0] = gl_TessLevelOuter[1] =
|
|
gl_TessLevelOuter[2] = gl_TessLevelOuter[3] = TessAmount/2.0;
|
|
gl_TessLevelInner[0] = gl_TessLevelInner[1] = TessAmount/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN33
|
|
gl_TessLevelOuter[0] = gl_TessLevelOuter[1] =
|
|
gl_TessLevelOuter[2] = gl_TessLevelOuter[3] = TessAmount/2.0;
|
|
gl_TessLevelInner[0] = gl_TessLevelInner[1] = TessAmount/2.0;
|
|
#endif
|
|
|
|
|
|
#ifdef OSD_TRANSITION_PATTERN40
|
|
gl_TessLevelOuter[0] = TessAmount/2.0;
|
|
gl_TessLevelOuter[1] = TessAmount;
|
|
gl_TessLevelOuter[2] = TessAmount/2.0;
|
|
gl_TessLevelOuter[3] = TessAmount;
|
|
|
|
gl_TessLevelInner[0] = TessAmount;
|
|
gl_TessLevelInner[1] = TessAmount/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN41
|
|
gl_TessLevelOuter[0] = TessAmount/2.0;
|
|
gl_TessLevelOuter[1] = TessAmount;
|
|
gl_TessLevelOuter[2] = TessAmount/2.0;
|
|
gl_TessLevelOuter[3] = TessAmount;
|
|
|
|
gl_TessLevelInner[0] = TessAmount;
|
|
gl_TessLevelInner[1] = TessAmount/2.0;
|
|
#endif
|
|
|
|
#endif // OSD_ENABLE_SCREENSPACE_TESSELLATION
|
|
}
|
|
|
|
#endif
|
|
|
|
//----------------------------------------------------------
|
|
// Patches.TessEvalTransition
|
|
//----------------------------------------------------------
|
|
#ifdef OSD_PATCH_TESS_EVAL_BSPLINE_SHADER
|
|
|
|
vec2
|
|
GetTransitionSubpatchUV()
|
|
{
|
|
#ifdef OSD_TRANSITION_TRIANGLE_SUBPATCH
|
|
vec3 uvw = gl_TessCoord.xyz;
|
|
#else
|
|
vec2 uv = gl_TessCoord.xy;
|
|
#endif
|
|
vec2 UV = vec2(0, 0);
|
|
|
|
// OSD_TRANSITION_PATTERN0*
|
|
// +-------------+
|
|
// | /\\ |
|
|
// | 1 / \\ 2 |
|
|
// | / \\ |
|
|
// | / \\ |
|
|
// | / 0 \\ |
|
|
// |/ \\|
|
|
// +-------------+
|
|
|
|
#ifdef OSD_TRANSITION_PATTERN00
|
|
UV.x = 1.0-uvw.y-uvw.z/2;
|
|
UV.y = 1.0-uvw.z;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN01
|
|
UV.x = 1.0-uvw.y/2;
|
|
UV.y = uvw.x;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN02
|
|
UV.x = uvw.z/2;
|
|
UV.y = uvw.x;
|
|
#endif
|
|
|
|
// OSD_TRANSITION_PATTERN1*
|
|
// +-------------+
|
|
// | 0 /\\ 2 |
|
|
// | / \\ |
|
|
// | / 3 \\ |
|
|
// | / / |
|
|
// | / / 1 |
|
|
// |/ / |
|
|
// +-------------+
|
|
|
|
#ifdef OSD_TRANSITION_PATTERN10
|
|
UV.x = 1.0-uvw.x/2.0;
|
|
UV.y = uvw.z;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN11
|
|
UV.x = uvw.y;
|
|
UV.y = 1.0-uvw.x/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN12
|
|
UV.x = uvw.x/2.0;
|
|
UV.y = uvw.y/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN13
|
|
UV.x = 1.0-uvw.x-uvw.y/2.0;
|
|
UV.y = 1.0-uvw.y-uvw.x/2.0;
|
|
#endif
|
|
|
|
// OSD_TRANSITION_PATTERN2*
|
|
// +-------------+
|
|
// | |
|
|
// | 0 |
|
|
// | |
|
|
// |-------------|
|
|
// |\\ 3 / |
|
|
// | \\ / |
|
|
// | 1 \\ / 2 |
|
|
// +-------------+
|
|
|
|
#ifdef OSD_TRANSITION_PATTERN20
|
|
UV.x = 1.0-uv.y;
|
|
UV.y = uv.x/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN21
|
|
UV.x = uvw.z/2.0;
|
|
UV.y = 1.0-uvw.y/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN22
|
|
UV.x = 1.0-uvw.x/2.0;
|
|
UV.y = 1.0-uvw.y/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN23
|
|
UV.x = 1.0-uvw.y-uvw.x/2;
|
|
UV.y = 0.5+uvw.x/2.0;
|
|
#endif
|
|
|
|
// OSD_TRANSITION_PATTERN3*
|
|
// +-------------+
|
|
// | | |
|
|
// | 1 | 0 |
|
|
// | | |
|
|
// |------|------|
|
|
// | | |
|
|
// | 3 | 2 |
|
|
// | | |
|
|
// +-------------+
|
|
|
|
#ifdef OSD_TRANSITION_PATTERN30
|
|
UV.x = uv.y/2.0;
|
|
UV.y = 0.5 - uv.x/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN31
|
|
UV.x = 0.5 - uv.x/2.0;
|
|
UV.y = 1.0 - uv.y/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN32
|
|
UV.x = 0.5 + uv.x/2.0;
|
|
UV.y = uv.y/2.0;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN33
|
|
UV.x = 1.0 - uv.y/2.0;
|
|
UV.y = 0.5 + uv.x/2.0;
|
|
#endif
|
|
|
|
// OSD_TRANSITION_PATTERN4*
|
|
// +-------------+
|
|
// | | |
|
|
// | | |
|
|
// | | |
|
|
// | 1 | 0 |
|
|
// | | |
|
|
// | | |
|
|
// | | |
|
|
// +-------------+
|
|
|
|
#ifdef OSD_TRANSITION_PATTERN40
|
|
UV.x = 0.5 - uv.y/2.0;
|
|
UV.y = uv.x;
|
|
#endif
|
|
#ifdef OSD_TRANSITION_PATTERN41
|
|
UV.x = 1.0 - uv.y/2.0;
|
|
UV.y = uv.x;
|
|
#endif
|
|
|
|
return UV;
|
|
}
|
|
|
|
#endif
|