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ray:: volumetric raycasting
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Zeno Rogue
parent
3c8d5979f1
commit
17e056cdb4
109
raycaster.cpp
109
raycaster.cpp
@ -15,7 +15,7 @@ EX namespace ray {
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#if CAP_RAY
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/** texture IDs */
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GLuint txConnections = 0, txWallcolor = 0, txTextureMap = 0;
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GLuint txConnections = 0, txWallcolor = 0, txTextureMap = 0, txVolumetric = 0;
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EX bool in_use;
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EX bool comparison_mode;
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@ -101,7 +101,7 @@ EX bool requested() {
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struct raycaster : glhr::GLprogram {
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GLint uStart, uStartid, uM, uLength, uFovX, uFovY, uIPD, uShift;
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GLint uWallstart, uWallX, uWallY;
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GLint tConnections, tWallcolor, tTextureMap;
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GLint tConnections, tWallcolor, tTextureMap, tVolumetric;
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GLint uBinaryWidth, uPLevel, uLP, uStraighten, uReflectX, uReflectY;
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GLint uLinearSightRange, uExpStart, uExpDecay;
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GLint uBLevel;
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@ -143,6 +143,7 @@ raycaster::raycaster(string vsh, string fsh) : GLprogram(vsh, fsh) {
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tConnections = glGetUniformLocation(_program, "tConnections");
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tWallcolor = glGetUniformLocation(_program, "tWallcolor");
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tTextureMap = glGetUniformLocation(_program, "tTextureMap");
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tVolumetric = glGetUniformLocation(_program, "tVolumetric");
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uWallOffset = glGetUniformLocation(_program, "uWallOffset");
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uSides = glGetUniformLocation(_program, "uSides");
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@ -232,6 +233,7 @@ void enable_raycaster() {
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"uniform mediump vec2 uStartid;\n"
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"uniform mediump sampler2D tConnections;\n"
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"uniform mediump sampler2D tWallcolor;\n"
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"uniform mediump sampler2D tVolumetric;\n"
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"uniform mediump sampler2D tTexture;\n"
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"uniform mediump sampler2D tTextureMap;\n"
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"uniform mediump vec4 uWallX["+rays+"];\n"
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@ -844,6 +846,17 @@ void enable_raycaster() {
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"}\n";
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}
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if(volumetric::on) fmain +=
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"if(dist > 0. && go < " + to_glsl(hard_limit) + ") {\n"
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" if(dist > "+to_glsl(hard_limit)+" - go) dist = "+to_glsl(hard_limit)+" - go;\n"
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" mediump float d = uExpStart * exp(-go / uExpDecay);\n"
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" mediump vec4 col = texture2D(tVolumetric, cid);\n"
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" mediump float factor = col.w; col.w = 1.;\n"
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" mediump float frac = (1.-exp(-(factor + 1. / uExpDecay) * dist));\n"
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" col = frac * (col * d + uFogColor * (1.-d));\n"
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" gl_FragColor += left * col;\n"
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" }\n;";
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fmain += " go = go + dist;\n";
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fmain += "if(which == -1) continue;\n";
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@ -874,8 +887,14 @@ void enable_raycaster() {
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" col.xyz *= texture2D(tTexture, inface2).rgb;\n"
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" }\n";
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if(volumetric::on)
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fmain += " mediump float d = uExpStart * exp(-go / uExpDecay);\n";
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else
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fmain +=
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" mediump float d = max(1. - go / uLinearSightRange, uExpStart * exp(-go / uExpDecay));\n";
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fmain +=
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" mediump float d = max(1. - go / uLinearSightRange, uExpStart * exp(-go / uExpDecay));\n"
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" col.xyz = col.xyz * d + uFogColor.xyz * (1.-d);\n";
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if(nil) fmain +=
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@ -1231,9 +1250,19 @@ EX void cast() {
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vector<array<float, 4>> connections(length * rows);
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vector<array<float, 4>> wallcolor(length * rows);
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vector<array<float, 4>> texturemap(length * rows);
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vector<array<float, 4>> volumetric(length * rows);
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if(1) for(cell *c: lst) {
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int id = ids[c];
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auto& vmap = volumetric::vmap;
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if(volumetric::on && vmap.count(c) && (vmap[c] & 0xFF)) {
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celldrawer dd;
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dd.c = c;
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dd.setcolors();
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int u = (id/per_row*length) + (id%per_row * deg);
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color_t vcolor = (dd.fcol << 8) | vmap[c];
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volumetric[u] = glhr::acolor(vcolor);
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}
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forCellIdEx(c1, i, c) {
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int u = (id/per_row*length) + (id%per_row * deg) + i;
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if(!ids.count(c1)) {
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@ -1344,8 +1373,11 @@ EX void cast() {
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if(o->uBLevel != -1)
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glUniform1f(o->uBLevel, log(bt::expansion()) / 2);
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glUniform1f(o->uLinearSightRange, sightranges[geometry]);
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if(o->uLinearSightRange != -1)
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glUniform1f(o->uLinearSightRange, sightranges[geometry]);
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glUniform1f(o->uExpDecay, exp_decay_current());
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glUniform1f(o->uExpStart, exp_start);
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@ -1357,6 +1389,7 @@ EX void cast() {
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bind_array(wallcolor, o->tWallcolor, txWallcolor, 4);
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bind_array(connections, o->tConnections, txConnections, 3);
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bind_array(texturemap, o->tTextureMap, txTextureMap, 5);
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if(volumetric::on) bind_array(volumetric, o->tVolumetric, txVolumetric, 6);
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auto cols = glhr::acolor(darkena(backcolor, 0, 0xFF));
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glUniform4f(o->uFogColor, cols[0], cols[1], cols[2], cols[3]);
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@ -1379,6 +1412,71 @@ EX void cast() {
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GLERR("finish");
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}
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EX namespace volumetric {
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EX bool on;
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EX map<cell*, color_t> vmap;
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int intensity = 16;
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EX void enable() {
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if(!on) {
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on = true;
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reset_raycaster();
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}
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}
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EX void random_fog() {
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enable();
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for(cell *c: currentmap->allcells())
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vmap[c] = ((rand() % 0x1000000) << 8) | intensity;
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}
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EX void menu() {
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cmode = sm::SIDE | sm::MAYDARK;
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gamescreen(0);
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dialog::init(XLAT("volumetric raycasting"));
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dialog::addBoolItem(XLAT("active"), on, 'a');
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dialog::add_action([&] {
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on = !on;
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reset_raycaster();
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});
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dialog::addSelItem(XLAT("intensity of random coloring"), its(intensity), 'i');
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dialog::add_action([] {
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dialog::editNumber(intensity, 0, 255, 5, 15, "", "");
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dialog::reaction = random_fog;
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});
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dialog::addItem(XLAT("color randomly"), 'r');
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dialog::add_action(random_fog);
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dialog::addColorItem("color cell under cursor", vmap.count(centerover) ? vmap[centerover] : 0, 'c');
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dialog::add_action([&] {
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enable();
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dialog::openColorDialog(vmap[centerover]);
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dialog::dialogflags |= sm::SIDE;
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});
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dialog::addColorItem("color cell under player", vmap.count(cwt.at) ? vmap[cwt.at] : 0, 'p');
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dialog::add_action([&] {
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enable();
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dialog::openColorDialog(vmap[cwt.at]);
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dialog::dialogflags |= sm::SIDE;
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});
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dialog::addBreak(150);
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dialog::addHelp("This fills all the cells with glowing fog, for cool visualizations");
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dialog::addBreak(150);
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dialog::addBack();
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dialog::display();
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}
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EX }
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EX void configure() {
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cmode = sm::SIDE | sm::MAYDARK;
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gamescreen(0);
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@ -1449,6 +1547,9 @@ EX void configure() {
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});
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}
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dialog::addBoolItem(XLAT("volumetric raytracing"), volumetric::on, 'v');
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dialog::add_action_push(volumetric::menu);
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dialog::addSelItem(XLAT("iterations"), its(max_iter_current()), 's');
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dialog::add_action([&] {
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dialog::editNumber(max_iter_current(), 0, 600, 1, 60, XLAT("iterations"), "in H3/H2xE/E3 this is the number of cell boundaries; in nonisotropic, the number of simulation steps");
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