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panini: frustum_culling disabling done nicely

This commit is contained in:
Zeno Rogue 2020-11-01 21:38:45 +01:00
parent 3288eb0c5a
commit fd9fb83540
2 changed files with 13 additions and 9 deletions
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2
graph.cpp
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@ -3705,7 +3705,7 @@ EX bool frustum_culling = true;
void make_clipping_planes() {
#if MAXMDIM >= 4
clipping_planes.clear();
if(!frustum_culling || PIU(sphere) || experimental || vid.stereo_mode == sODS) return;
if(!frustum_culling || PIU(sphere) || experimental || vid.stereo_mode == sODS || panini_alpha) return;
auto add_clipping_plane = [] (ld x1, ld y1, ld x2, ld y2) {
ld z1 = 1, z2 = 1;
hyperpoint sx = point3(y1 * z2 - y2 * z1, z1 * x2 - z2 * x1, x1 * y2 - x2 * y1);

20
shaders.cpp
View File

@ -66,6 +66,17 @@ EX void reset_all_shaders() {
matched_programs.clear();
}
EX string panini_shader() {
return
"t.w += 1.; t *= 2. / t.w; t.w -= 1.;\n"
"float s = t.z;\n"
"float l = length(t.xyz);\n"
"t /= max(length(t.xz), 1e-2);\n"
"t.z += " + glhr::to_glsl(panini_alpha) + ";\n"
"t *= l;\n"
"t.w = 1.;\n";
}
shared_ptr<glhr::GLprogram> write_shader(flagtype shader_flags) {
string varying, vsh, fsh, vmain = "void main() {\n", fmain = "void main() {\n";
@ -342,14 +353,7 @@ shared_ptr<glhr::GLprogram> write_shader(flagtype shader_flags) {
if(WDIM == 3 && panini_alpha) {
vmain += "t = uPP * t;", vsh += "uniform mediump mat4 uPP;";
/* panini */
vmain += "t.w += 1.; t *= 2. / t.w; t.w -= 1.;\n";
vmain += "float s = t.z;";
vmain += "float l = length(t.xyz);";
vmain += "t /= max(length(t.xz), 1e-2);\n";
vmain += "t.z += " + glhr::to_glsl(panini_alpha) + ";\n";
vmain += "t *= l;\n";
vmain += "t.w = 1.;\n";
frustum_culling = false;
vmain += panini_shader();
shader_flags |= SF_ORIENT;
}