0032208: Tests - refactor visualization tests to cover several graphic drivers

Removed testgrids 'bugs/vis' and '3rdparty'; tests have been redistributed across other grids.
Moved testgrid 'v3d/ivtk' into dedicated 'vtk/ivtk'.

Added testgrid 'vselect' dedicated to 3D viewer picking/selection functionality
and filled with tests from 'v3d/vertex', 'v3d/face' and similar groups.

Added testgrid 'opengl' dedicated to OpenGL driver low-level functionality (GLSL programs and similar)
and filled with tests from 'v3d/glsl', 'v3d/raytrace', '3rdparty/fonts', 'bugs/vis' (portion) and similar.

Added testgrid 'opengles3' dedicated to OpenGL ES 3.0 driver low-level functionality
and reusing tests from 'opengl' testgrid.
Subgroup 'opengles3/raytrace' is disabled on Windows, as Ray-Tracing currently requires OpenGL ES 3.2.
while ANGLE library implements only OpenGL ES 3.0.

Added testgrid 'opengles2' dedicated to OpenGL ES 2.0 driver low-level functionality
and reusing a limited subset of passing tests from 'opengl' testgrid.
Currently testgrid is activated only on Windows platform when using ANGLE library
(properietary OpenGL ES drivers do not allow creation of restricted 2.0 context).

Test cases have been cleaned out to put bug description into log,
to properly load necessary plugins and to explicitly dump viewer.

tests/opengl/data/shaderprog/phong_box

@@ -0,0 +1,29 @@
+puts "========"
+puts "Per-pixel lighting using GLSL program (Phong shading)"
+puts "========"
+
+pload MODELING VISUALIZATION
+
+# create box
+box b 1 2 3
+
+# draw box
+vclear
+vclose ALL
+vinit View1
+vsetdispmode 1
+vaxo
+vdisplay b
+vfit
+vrotate 0.2 0.0 0.0
+
+# take snapshot with fixed pipeline
+vdump $::imagedir/${::casename}_OFF.png
+vshaderprog b phong
+vdump $::imagedir/${::casename}_ph1.png
+
+vclear
+vdisplay b
+vshaderprog b phong
+vdump $::imagedir/${::casename}_ph2.png
+vmoveto 250 250

tests/opengl/data/shaderprog/phong_couple

@@ -0,0 +1,33 @@
+puts "========"
+puts "Per-pixel lighting using GLSL program (Phong shading)"
+puts "========"
+
+pload MODELING VISUALIZATION
+
+# import model
+restore [locate_data_file occ/fuse.brep] f
+tclean f
+box b 2 0 0 1 0.5 0.25
+
+# draw box
+vclear
+vclose ALL
+vinit View1
+vdefaults -absDefl 0.5
+vsetdispmode 1
+vaxo
+vdisplay f
+vfit
+vrotate -0.5 0.0 0.0
+vdisplay b
+vfit
+
+# take snapshot with fixed pipeline
+vdump $::imagedir/${::casename}_OFF.png
+
+vshaderprog f phong
+vshaderprog b phong
+vshaderprog b off
+vrotate -0.2 0.0 0.0
+vmoveto 100 100
+vdump $::imagedir/${::casename}_ph1.png

tests/opengl/data/shaderprog/phong_fuse

@@ -0,0 +1,32 @@
+puts "========"
+puts "Per-pixel lighting using GLSL program (Phong shading)"
+puts "========"
+
+pload MODELING VISUALIZATION
+
+# import model
+restore [locate_data_file occ/fuse.brep] f
+tclean f
+
+# draw box
+vclear
+vclose ALL
+vinit View1
+vdefaults -absDefl 0.5
+vsetdispmode 1
+vaxo
+vdisplay f
+vfit
+vrotate -0.5 0.0 0.0
+vfit
+
+# take snapshot with fixed pipeline
+vdump $::imagedir/${::casename}_OFF.png
+vshaderprog f phong
+vdump $::imagedir/${::casename}_ph1.png
+
+vclear
+vdisplay f
+vshaderprog f phong
+vdump $::imagedir/${::casename}_ph2.png
+vmoveto 250 250

tests/opengl/data/shaderprog/phong_fuse2

@@ -0,0 +1,42 @@
+puts "========"
+puts "Per-pixel lighting using GLSL program (Phong shading)"
+puts "========"
+
+pload MODELING VISUALIZATION
+
+# import model
+restore [locate_data_file occ/fuse.brep] f
+tclean f
+
+# draw box
+vclear
+vclose ALL
+vinit View1
+vdefaults -absDefl 0.5
+vsetdispmode 1
+vaxo
+vdisplay f
+vfit
+vrotate -0.5 0.0 0.0
+vfit
+
+# setup lights
+vlight delete 0
+vlight delete 0
+vlight delete 0
+vlight delete 0
+vlight delete 0
+vlight add ambient                color WHITE
+vlight add directional dir  1 0 0 color GREEN headlight 1
+vlight add directional dir -1 0 0 color RED1  headlight 1
+
+# take snapshot with fixed pipeline
+vdump $::imagedir/${::casename}_OFF.png
+vshaderprog f phong
+vdump $::imagedir/${::casename}_ph1.png
+
+vclear
+vdisplay f
+vshaderprog f phong
+vdump $::imagedir/${::casename}_ph2.png
+vmoveto 250 250

tests/opengl/data/shaderprog/phong_plastic

@@ -0,0 +1,32 @@
+puts "========"
+puts "Per-pixel lighting using GLSL program (Phong shading), check plastic material"
+puts "========"
+
+pload MODELING VISUALIZATION
+
+# create box
+box b 1 2 3
+
+# draw box
+vclear
+vclose ALL
+vinit View1
+vsetdispmode 1
+vaxo
+vdisplay     b
+vsetmaterial b PLASTIC
+vsetcolor    b GREEN
+vfit
+vrotate 0.2 0.0 0.0
+
+# take snapshot with fixed pipeline
+vdump $::imagedir/${::casename}_OFF.png
+set aColorL [vreadpixel 150 250 rgb name]
+set aColorR [vreadpixel 250 250 rgb name]
+if { "$aColorL" != "GREEN3" || "$aColorR" != "GREEN4" } { puts "Error: wrong color (fixed pipeline)!" }
+
+vshaderprog b phong
+set aColorL [vreadpixel 150 250 rgb name]
+set aColorR [vreadpixel 250 250 rgb name]
+if { "$aColorL" != "GREEN3" || "$aColorR" != "GREEN4" } { puts "Error: wrong color (Phong shader)!" }
+vdump ${imagedir}/${casename}.png

tests/opengl/data/shaderprog/phong_sides

@@ -0,0 +1,34 @@
+puts "========"
+puts "Per-pixel lighting using GLSL program (Phong shading), check lighting of back faces"
+puts "========"
+
+pload MODELING VISUALIZATION
+
+# create box
+box b 1 2 3
+explode b F
+
+# draw box
+vclear
+vclose ALL
+vinit View1
+vsetdispmode 1
+vaxo
+vdisplay b_1 b_2
+vfit
+vrotate 0.2 0.0 0.0
+
+# take snapshot with fixed pipeline
+vdump $::imagedir/${::casename}_OFF.png
+set aColorB [vreadpixel 150 150 rgb name]
+set aColorF [vreadpixel 250 250 rgb name]
+if { "$aColorB" != "$aColorF"} { puts "Error: front/back colors are different!" }
+set aColorFixed $aColorF
+
+# activate phong shader
+vshaderprog phong
+set aColorB [vreadpixel 150 150 rgb name]
+set aColorF [vreadpixel 250 250 rgb name]
+if { "$aColorB" != "$aColorF"} { puts "Error: front/back colors are different!" }
+if { "$aColorF" != "$aColorFixed"} { puts "Error: colors are different!" }
+vdump ${imagedir}/${casename}.png

tests/opengl/data/shaderprog/phong_views

@@ -0,0 +1,30 @@
+puts "========"
+puts "Per-pixel lighting using GLSL program (Phong shading)"
+puts "========"
+
+pload MODELING VISUALIZATION
+
+# create box
+box b 1 2 3
+
+# draw box
+vclear
+vclose ALL
+vinit View1
+vsetdispmode 1
+vaxo
+vdisplay b
+vfit
+vrotate 0.2 0.0 0.0
+
+vshaderprog b phong
+vdump $::imagedir/${::casename}_v1.png
+
+vinit View2
+vfit
+vdump $::imagedir/${::casename}_v2.png
+vmoveto 250 250
+vdump $::imagedir/${::casename}_v2sel.png
+vactivate View1
+vdump $::imagedir/${::casename}_v1sel.png
+vclose View2

tests/opengl/data/shaderprog/texture_multi1

@@ -0,0 +1,42 @@
+puts "========"
+puts "0028912: Visualization, TKOpenGl - multi-texture support"
+puts "========"
+
+pload MODELING VISUALIZATION
+
+set aShaderVert "
+THE_SHADER_OUT vec2 TexCoord;
+void main() {
+  TexCoord    = occTexCoord.st;
+  gl_Position = occProjectionMatrix * occWorldViewMatrix * occModelWorldMatrix * occVertex;
+}"
+
+set aShaderFrag "
+uniform sampler2D occSampler1;
+uniform sampler2D occSampler2;
+uniform sampler2D occSampler3;
+THE_SHADER_IN vec2 TexCoord;
+void main() {
+  if      (TexCoord.s <  0.5 && TexCoord.t <  0.5) { occFragColor = occTexture2D(occSampler0, TexCoord.st); }
+  else if (TexCoord.s <  0.5 && TexCoord.t >= 0.5) { occFragColor = occTexture2D(occSampler1, TexCoord.st); }
+  else if (TexCoord.s >= 0.5 && TexCoord.t <  0.5) { occFragColor = occTexture2D(occSampler2, TexCoord.st); }
+  else                                             { occFragColor = occTexture2D(occSampler3, TexCoord.st); }
+}"
+
+# draw a box
+box b 1 2 3
+vclear
+vclose ALL
+vinit View1
+vaxo
+vdisplay -dispMode 1 b
+vfit
+vrotate 0.2 0.0 0.0
+
+# take snapshot with built-in shader
+vtexture b -tex0 3 -tex1 4 -tex2 5 -tex3 6
+vdump $::imagedir/${::casename}_normal.png
+
+#vshaderprog b $aShaderVert $aShaderFrag
+vshaderprog b -vert $aShaderVert -frag $aShaderFrag
+vdump $::imagedir/${::casename}_multi.png