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glhr:: shaderside projection for the half-plane model

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This commit is contained in:
Zeno Rogue 2018-11-19 20:52:01 +01:00
parent a282913521
commit e25bc8e455
4 changed files with 32 additions and 12 deletions
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24
basegraph.cpp
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@ -199,6 +199,13 @@ void eyewidth_translate(int ed) {
if(ed) glhr::projection_multiply(glhr::translate(-ed * current_display->eyewidth(), 0, 0));
}
glhr::glmatrix model_orientation_gl() {
glhr::glmatrix s = glhr::id;
for(int a=0; a<2; a++)
conformal::apply_orientation(s[a][1], s[a][0]);
return s;
}
void display_data::set_projection(int ed, bool apply_models) {
DEBB(DF_GRAPH, (debugfile,"current_display->set_projection\n"));
@ -207,8 +214,10 @@ void display_data::set_projection(int ed, bool apply_models) {
if(vid.consider_shader_projection) {
if(pmodel == mdDisk && !spherespecial && !(hyperbolic && vid.alpha <= -1))
shaderside_projection = true;
if(pmodel == mdBand && hyperbolic && apply_models && !inHighQual)
if(pmodel == mdBand && hyperbolic && apply_models)
shaderside_projection = true, glhr::new_shader_projection = glhr::shader_projection::band;
if(pmodel == mdHalfplane && hyperbolic && apply_models)
shaderside_projection = true, glhr::new_shader_projection = glhr::shader_projection::halfplane;
}
start_projection(ed, shaderside_projection);
@ -249,11 +258,16 @@ void display_data::set_projection(int ed, bool apply_models) {
if(glhr::new_shader_projection == glhr::shader_projection::band) {
glhr::projection_multiply(glhr::scale(2 / M_PI, 2 / M_PI,1));
glhr::glmatrix s = glhr::id;
for(int a=0; a<2; a++)
conformal::apply_orientation(s[a][1], s[a][0]);
glhr::projection_multiply(s);
glhr::projection_multiply(model_orientation_gl());
}
if(glhr::new_shader_projection == glhr::shader_projection::halfplane) {
glhr::projection_multiply(glhr::translate(0, 1, 0));
glhr::projection_multiply(glhr::scale(-1, 1, 1));
glhr::projection_multiply(glhr::scale(conformal::halfplane_scale, conformal::halfplane_scale, 1));
glhr::projection_multiply(model_orientation_gl());
glhr::projection_multiply(glhr::translate(0, 0.5, 0));
}
}
cameraangle_on = false;

2
hyper.h
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@ -3647,7 +3647,7 @@ namespace glhr {
const GLfloat* as_array() const { return a[0]; }
};
enum class shader_projection { standard, band, MAX };
enum class shader_projection { standard, band, halfplane, MAX };
extern shader_projection new_shader_projection;

2
polygons.cpp
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@ -475,7 +475,7 @@ void glapplymatrix(const transmatrix& V) {
}
mat[12] = 0;
mat[13] = 0;
mat[14] = (glhr::current_shader_projection == glhr::shader_projection::standard) ? GLfloat(vid.alpha) : 0;
mat[14] = (glhr::current_shader_projection != glhr::shader_projection::band) ? GLfloat(vid.alpha) : 0;
mat[15] = 1;
if(vid.stretch != 1) mat[1] *= vid.stretch, mat[5] *= vid.stretch, mat[9] *= vid.stretch, mat[13] *= vid.stretch;

16
shaders.cpp
View File

@ -488,6 +488,7 @@ void init() {
bool mps = j != 0;
bool band = (sp == shader_projection::band);
bool hp = (sp == shader_projection::halfplane);
programs[i][j] = new GLprogram(stringbuilder(
@ -532,16 +533,21 @@ void init() {
lfog, "vColor = vColor * clamp(1.0 + aPosition.z * uFog, 0.0, 1.0);",
!mps, "gl_Position = uMVP * aPosition;",
mps&&!band,"gl_Position = uP * (uMV * aPosition);",
band, "vec4 t = uMV * aPosition;",
band, "float zlev = zlevel(t);",
band, "t /= zlev;",
band||hp, "vec4 t = uMV * aPosition;",
band||hp, "float zlev = zlevel(t);",
band||hp, "t /= zlev;",
band, "float ty = asinh(t.y);",
band, "float tx = asinh(t.x / cosh(ty));",
band, "ty = 2.0 * atan(tanh(ty/2.0));",
band, "t[0] = tx; t[1] = ty; t[2] = 1.0; t[3] = 1.0;",
band, "gl_Position = uP * t;",
hp, "t.x /= t.z; t.y /= t.z; t.y = t.y + 1.0; ",
hp, "float rads = t.x * t.x + t.y * t.y; ",
hp, "t.x /= -rads; t.y /= -rads; t.z = 1.0; t[3] = 1.0;",
band || hp,"gl_Position = uP * t;",
1, "}"),
stringbuilder(