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OpenSubdiv/opensubdiv/osd/glslPatchTransition.glsl

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//
// 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.
//
#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)
#define OSD_TRANSITION_TRIANGLE_SUBPATCH
#else
#undef OSD_TRANSITION_TRIANGLE_SUBPATCH
#endif
//----------------------------------------------------------
// Patches.TessControlTransition
//----------------------------------------------------------
#ifdef OSD_PATCH_TESS_CONTROL_BSPLINE_SHADER
void
SetTransitionTessLevels(vec3 cp[OSD_PATCH_INPUT_SIZE], int patchLevel)
{
#ifdef OSD_ENABLE_SCREENSPACE_TESSELLATION
// These tables map the 9, 12, or 16 input control points onto the
// canonical 16 control points for a regular patch.
#if defined OSD_PATCH_BOUNDARY
const int p[16] = int[]( 0, 1, 2, 3, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 );
#elif defined OSD_PATCH_CORNER
const int p[16] = int[]( 0, 1, 2, 2, 0, 1, 2, 2, 3, 4, 5, 5, 6, 7, 8, 8 );
#else
const int p[16] = int[]( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
#endif
#if OSD_TRANSITION_ROTATE == 0
const int r[16] = int[]( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 );
#elif OSD_TRANSITION_ROTATE == 1
const int r[16] = int[]( 12, 8, 4, 0, 13, 9, 5, 1, 14, 10, 6, 2, 15, 11, 7, 3 );
#elif OSD_TRANSITION_ROTATE == 2
const int r[16] = int[]( 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 );
#elif OSD_TRANSITION_ROTATE == 3
const int r[16] = int[]( 3, 7, 11, 15, 2, 6, 10, 14, 1, 5, 9, 13, 0, 4, 8, 12 );
#endif
// Expand and rotate control points using remapping tables above
vec3 pv0 = cp[p[r[0]]];
vec3 pv1 = cp[p[r[1]]];
vec3 pv2 = cp[p[r[2]]];
vec3 pv3 = cp[p[r[3]]];
vec3 pv4 = cp[p[r[4]]];
vec3 pv5 = cp[p[r[5]]];
vec3 pv6 = cp[p[r[6]]];
vec3 pv7 = cp[p[r[7]]];
vec3 pv8 = cp[p[r[8]]];
vec3 pv9 = cp[p[r[9]]];
vec3 pv10 = cp[p[r[10]]];
vec3 pv11 = cp[p[r[11]]];
vec3 pv12 = cp[p[r[12]]];
vec3 pv13 = cp[p[r[13]]];
vec3 pv14 = cp[p[r[14]]];
vec3 pv15 = cp[p[r[15]]];
// Each edge of a transition patch is adjacent to one or two
// patches at the next refined level of subdivision.
// Compute the corresponding vertex-vertex and edge-vertex refined
// points along the edges of the patch using Catmull-Clark subdivision
// stencil weights.
// For simplicity, we let the optimizer discard unused computation.
vec3 vv0 = (pv0 + pv2 + pv8 + pv10) * 0.015625 +
(pv1 + pv4 + pv6 + pv9) * 0.09375 + pv5 * 0.5625;
vec3 ev01 = (pv1 + pv2 + pv9 + pv10) * 0.0625 + (pv5 + pv6) * 0.375;
vec3 vv1 = (pv1 + pv3 + pv9 + pv11) * 0.015625 +
(pv2 + pv5 + pv7 + pv10) * 0.09375 + pv6 * 0.5625;
vec3 ev12 = (pv5 + pv7 + pv9 + pv11) * 0.0625 + (pv6 + pv10) * 0.375;
vec3 vv2 = (pv5 + pv7 + pv13 + pv15) * 0.015625 +
(pv6 + pv9 + pv11 + pv14) * 0.09375 + pv10 * 0.5625;
vec3 ev23 = (pv5 + pv6 + pv13 + pv14) * 0.0625 + (pv9 + pv10) * 0.375;
vec3 vv3 = (pv4 + pv6 + pv12 + pv14) * 0.015625 +
(pv5 + pv8 + pv10 + pv13) * 0.09375 + pv9 * 0.5625;
vec3 ev30 = (pv4 + pv6 + pv8 + pv10) * 0.0625 + (pv5 + pv9) * 0.375;
// The vertices along boundaries and at corners are refined specially.
#if defined OSD_PATCH_BOUNDARY
#if OSD_TRANSITION_ROTATE == 0
vv0 = (pv4 + pv6) * 0.125 + pv5 * 0.75;
vv1 = (pv5 + pv7) * 0.125 + pv6 * 0.75;
#elif OSD_TRANSITION_ROTATE == 1
vv1 = (pv2 + pv10) * 0.125 + pv6 * 0.75;
vv2 = (pv6 + pv14) * 0.125 + pv10 * 0.75;
#elif OSD_TRANSITION_ROTATE == 2
vv2 = (pv9 + pv11) * 0.125 + pv10 * 0.75;
vv3 = (pv8 + pv10) * 0.125 + pv9 * 0.75;
#elif OSD_TRANSITION_ROTATE == 3
vv3 = (pv5 + pv13) * 0.125 + pv9 * 0.75;
vv0 = (pv1 + pv9) * 0.125 + pv5 * 0.75;
#endif
#elif defined OSD_PATCH_CORNER
#if OSD_TRANSITION_ROTATE == 0
vv0 = (pv4 + pv6) * 0.125 + pv5 * 0.75;
vv1 = pv6;
vv2 = (pv6 + pv14) * 0.125 + pv10 * 0.75;
#elif OSD_TRANSITION_ROTATE == 1
vv1 = (pv2 + pv10) * 0.125 + pv6 * 0.75;
vv2 = pv10;
vv3 = (pv8 + pv10) * 0.125 + pv9 * 0.75;
#elif OSD_TRANSITION_ROTATE == 2
vv2 = (pv9 + pv11) * 0.125 + pv10 * 0.75;
vv3 = pv9;
vv0 = (pv1 + pv9) * 0.125 + pv5 * 0.75;
#elif OSD_TRANSITION_ROTATE == 3
vv3 = (pv5 + pv13) * 0.125 + pv9 * 0.75;
vv0 = pv5;
vv1 = (pv5 + pv7) * 0.125 + pv6 * 0.75;
#endif
#endif
#ifdef OSD_TRANSITION_PATTERN00
gl_TessLevelOuter[0] = TessAdaptive(ev01, pv9) * 0.5;
gl_TessLevelOuter[1] = TessAdaptive(ev01, pv10) * 0.5;
gl_TessLevelOuter[2] = TessAdaptive(pv9, pv10);
gl_TessLevelInner[0] =
(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.5;
#endif
#ifdef OSD_TRANSITION_PATTERN01
gl_TessLevelOuter[0] = TessAdaptive(ev01, vv1);
gl_TessLevelOuter[1] = TessAdaptive(pv6, pv10);
gl_TessLevelOuter[2] = TessAdaptive(ev01, pv10) * 0.5;
gl_TessLevelInner[0] =
(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.25;
#endif
#ifdef OSD_TRANSITION_PATTERN02
gl_TessLevelOuter[0] = TessAdaptive(ev01, vv0);
gl_TessLevelOuter[1] = TessAdaptive(ev01, pv9) * 0.5;
gl_TessLevelOuter[2] = TessAdaptive(pv5, pv9);
gl_TessLevelInner[0] =
(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.25;
#endif
#ifdef OSD_TRANSITION_PATTERN10
gl_TessLevelOuter[0] = TessAdaptive(pv6, pv10);
gl_TessLevelOuter[1] = TessAdaptive(ev01, pv10);
gl_TessLevelOuter[2] = TessAdaptive(ev01, vv1);
gl_TessLevelInner[0] = (gl_TessLevelOuter[0] + gl_TessLevelOuter[1]) * 0.25;
#endif
#ifdef OSD_TRANSITION_PATTERN11
gl_TessLevelOuter[0] = TessAdaptive(pv9, pv10);
gl_TessLevelOuter[1] = TessAdaptive(ev30, vv3);
gl_TessLevelOuter[2] = TessAdaptive(ev30, pv10);
gl_TessLevelInner[0] = (gl_TessLevelOuter[0] + gl_TessLevelOuter[2]) * 0.25;
#endif
#ifdef OSD_TRANSITION_PATTERN12
gl_TessLevelOuter[0] = TessAdaptive(ev30, vv0);
gl_TessLevelOuter[1] = TessAdaptive(ev01, vv0);
gl_TessLevelOuter[2] = TessAdaptive(ev01, ev30);
gl_TessLevelInner[0] =
(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.25;
#endif
#ifdef OSD_TRANSITION_PATTERN13
gl_TessLevelOuter[0] = TessAdaptive(ev01, pv10);
gl_TessLevelOuter[1] = TessAdaptive(ev30, pv10);
gl_TessLevelOuter[2] = TessAdaptive(ev01, ev30);
gl_TessLevelInner[0] =
(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.25;
#endif
#ifdef OSD_TRANSITION_PATTERN20
gl_TessLevelOuter[0] = TessAdaptive(pv5, pv6);
gl_TessLevelOuter[1] = TessAdaptive(ev12, vv1);
gl_TessLevelOuter[2] = TessAdaptive(ev12, ev30);
gl_TessLevelOuter[3] = TessAdaptive(ev30, vv0);
gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
#endif
#ifdef OSD_TRANSITION_PATTERN21
gl_TessLevelOuter[0] = TessAdaptive(ev23, ev30) * 0.5;
gl_TessLevelOuter[1] = TessAdaptive(ev23, vv3);
gl_TessLevelOuter[2] = TessAdaptive(ev30, vv3);
gl_TessLevelInner[0] = (gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.5;
#endif
#ifdef OSD_TRANSITION_PATTERN22
gl_TessLevelOuter[0] = TessAdaptive(ev12, vv2);
gl_TessLevelOuter[1] = TessAdaptive(ev23, vv2);
gl_TessLevelOuter[2] = TessAdaptive(ev12, ev23) * 0.5;
gl_TessLevelInner[0] = (gl_TessLevelOuter[0] + gl_TessLevelOuter[1]) * 0.5;
#endif
#ifdef OSD_TRANSITION_PATTERN23
gl_TessLevelOuter[0] = TessAdaptive(ev12, ev30);
gl_TessLevelOuter[1] = TessAdaptive(ev12, ev23) * 0.5;
gl_TessLevelOuter[2] = TessAdaptive(ev23, ev30) * 0.5;
gl_TessLevelInner[0] =
(gl_TessLevelOuter[0] + gl_TessLevelOuter[1] + gl_TessLevelOuter[2]) * 0.5;
#endif
#ifdef OSD_TRANSITION_PATTERN30
gl_TessLevelOuter[0] = TessAdaptive(ev30, ev12) * 0.5;
gl_TessLevelOuter[1] = TessAdaptive(ev30, vv0);
gl_TessLevelOuter[2] = TessAdaptive(ev01, vv0);
gl_TessLevelOuter[3] = TessAdaptive(ev01, ev23) * 0.5;
gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
#endif
#ifdef OSD_TRANSITION_PATTERN31
gl_TessLevelOuter[0] = TessAdaptive(ev01, ev23) * 0.5;
gl_TessLevelOuter[1] = TessAdaptive(ev23, vv3);
gl_TessLevelOuter[2] = TessAdaptive(ev30, vv3);
gl_TessLevelOuter[3] = TessAdaptive(ev30, ev12) * 0.5;
gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
#endif
#ifdef OSD_TRANSITION_PATTERN32
gl_TessLevelOuter[0] = TessAdaptive(ev23, ev01) * 0.5;
gl_TessLevelOuter[1] = TessAdaptive(ev01, vv1);
gl_TessLevelOuter[2] = TessAdaptive(ev12, vv1);
gl_TessLevelOuter[3] = TessAdaptive(ev12, ev30) * 0.5;
gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
#endif
#ifdef OSD_TRANSITION_PATTERN33
gl_TessLevelOuter[0] = TessAdaptive(ev12, ev30) * 0.5;
gl_TessLevelOuter[1] = TessAdaptive(ev12, vv2);
gl_TessLevelOuter[2] = TessAdaptive(ev23, vv2);
gl_TessLevelOuter[3] = TessAdaptive(ev01, ev23) * 0.5;
gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
#endif
#ifdef OSD_TRANSITION_PATTERN40
gl_TessLevelOuter[0] = TessAdaptive(ev01, vv0);
gl_TessLevelOuter[1] = TessAdaptive(ev01, ev23);
gl_TessLevelOuter[2] = TessAdaptive(ev23, vv3);
gl_TessLevelOuter[3] = TessAdaptive(pv5, pv9);
gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
#endif
#ifdef OSD_TRANSITION_PATTERN41
gl_TessLevelOuter[0] = TessAdaptive(ev01, vv1);
gl_TessLevelOuter[1] = TessAdaptive(pv6, pv10);
gl_TessLevelOuter[2] = TessAdaptive(ev23, vv2);
gl_TessLevelOuter[3] = TessAdaptive(ev01, ev23);
gl_TessLevelInner[0] = max(gl_TessLevelOuter[1], gl_TessLevelOuter[3]);
gl_TessLevelInner[1] = max(gl_TessLevelOuter[0], gl_TessLevelOuter[2]);
#endif
#else // OSD_ENABLE_SCREENSPACE_TESSELLATION
float TessAmount = GetTessLevel(patchLevel);
#ifdef OSD_TRANSITION_PATTERN00
float side = sqrt(1.25)*TessAmount;
gl_TessLevelOuter[0] = side;
gl_TessLevelOuter[1] = side;
gl_TessLevelOuter[2] = TessAmount;
gl_TessLevelInner[0] = TessAmount;
#endif
#ifdef OSD_TRANSITION_PATTERN01
float side = sqrt(1.25)*TessAmount;
gl_TessLevelOuter[0] = TessAmount/2.0;
gl_TessLevelOuter[1] = TessAmount;
gl_TessLevelOuter[2] = side;
gl_TessLevelInner[0] = TessAmount/2.0;
#endif
#ifdef OSD_TRANSITION_PATTERN02
float side = sqrt(1.25)*TessAmount;
gl_TessLevelOuter[0] = TessAmount/2.0;
gl_TessLevelOuter[1] = side;
gl_TessLevelOuter[2] = TessAmount;
gl_TessLevelInner[0] = TessAmount/2.0;
#endif
#ifdef OSD_TRANSITION_PATTERN10
float side = sqrt(1.25) * TessAmount;
gl_TessLevelOuter[0] = TessAmount;
gl_TessLevelOuter[1] = side;
gl_TessLevelOuter[2] = TessAmount/2.0;
gl_TessLevelInner[0] = TessAmount/2;
#endif
#ifdef OSD_TRANSITION_PATTERN11
float side = sqrt(1.25) * TessAmount;
gl_TessLevelOuter[0] = TessAmount;
gl_TessLevelOuter[1] = TessAmount/2.0;
gl_TessLevelOuter[2] = side;
gl_TessLevelInner[0] = TessAmount/2;
#endif
#ifdef OSD_TRANSITION_PATTERN12
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;
#endif
#ifdef OSD_TRANSITION_PATTERN13
float side1 = sqrt(1.25) * TessAmount;
float side2 = sqrt(0.125) * TessAmount;
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
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