mirrors/hyperrogue
1
0
Fork 0
mirror of https://github.com/zenorogue/hyperrogue.git synced 2025-11-18 06:35:12 +00:00
Code Issues Releases Wiki Activity

sky-based fog in 2.5D

Browse Source
This commit is contained in:
Zeno Rogue
2020-08-01 13:59:53 +02:00
parent 3c198a3672
commit 7c3c34c3d8
5 changed files with 218 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
shaders.cpp
View File

@@ -44,6 +44,7 @@ constexpr int aTexture = 8;
/* texture bindings */
constexpr int INVERSE_EXP_BINDING = 2;
constexpr int AIR_BINDING = 4;
#endif
EX map<string, shared_ptr<glhr::GLprogram>> compiled_programs;
@@ -268,7 +269,39 @@ shared_ptr<glhr::GLprogram> write_shader(flagtype shader_flags) {
if(!skip_t) {
vmain += "mediump vec4 t = uMV * aPosition;\n";
vmain += coordinator;
if(distfun != "") {
if(GDIM == 3 && WDIM == 2) {
vsh +=
"uniform mediump mat4 uRadarTransform;\n"
"uniform mediump sampler2D tAirMap;\n"
"uniform mediump float uFog;\n"
"uniform mediump float uFogBase;\n"
"vec4 color_at(vec4 ending, float dist) {"
" vec3 pt = ending.xyz * sinh(dist);\n"
" pt.xy /= sqrt(pt.z*pt.z+1.);\n"
" pt.xy /= 2. * (1. + sqrt(1.+pt.x*pt.x+pt.y*pt.y));\n"
" pt.xy += vec2(.5, .5);\n"
" return texture2D(tAirMap, pt.xy);\n"
" }\n";
vmain +=
"vec4 ending = uRadarTransform * t;\n"
"float len = acosh(ending.w);\n"
"float eulen = length(ending.xyz);\n"
"ending.xyz /= eulen;\n"
"ending.y *= -1.;\n"
"vec4 fog = vec4(1e-3,0,1e-3,1e-3);\n"
"vec4 last = vec4(0,0,0,0);\n"
"for(int i=0; i<50; i++) {\n"
" vec4 px = color_at(ending, ((float(i) + .5) / 50.) * min(len, uFog));\n"
" if(px.r < .9 || px.b < .9 || px.g > .1) last = px;\n"
" fog += last;\n"
" }\n"
"mediump float fogs = (uFogBase - len / uFog);\n"
"if(fogs < 0.) fogs = 0.;\n"
"fog.xyz /= fog.w;\n"
"vColor.xyz = vColor.xyz * fogs + fog.xyz * (1.0-fogs);\n";
}
else if(distfun != "") {
vmain += "mediump float fogs = (uFogBase - " + distfun + " / uFog);\n";
vmain += "vColor.xyz = vColor.xyz * fogs + uFogColor.xyz * (1.0-fogs);\n";
vsh +=
@@ -357,6 +390,16 @@ void display_data::set_projection(int ed, ld shift) {
}
#endif
if(selected->tAirMap != -1) {
glActiveTexture(GL_TEXTURE0 + AIR_BINDING);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glBindTexture(GL_TEXTURE_2D, airbuf->renderedTexture);
glUniform1i(selected->tAirMap, AIR_BINDING);
glActiveTexture(GL_TEXTURE0 + 0);
glUniformMatrix4fv(selected->uRadarTransform, 1, 0, glhr::tmtogl_transpose3(radar_transform).as_array());
}
if(selected->uIterations != -1) {
glhr::set_index_sl(0);
glhr::set_sv(stretch::not_squared());