luboslenco
132 lines
7.7 KiB
C
132 lines
7.7 KiB
C
node_shader_context_t *make_mesh_preview_run(material_t *data, material_context_t *matcon) {
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char *context_id = "mesh";
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shader_context_t *props = GC_ALLOC_INIT(shader_context_t, {.name = context_id,
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.depth_write = true,
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.compare_mode = "less",
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.cull_mode = "clockwise",
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.vertex_elements = any_array_create_from_raw(
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(any[]){
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GC_ALLOC_INIT(vertex_element_t, {.name = "pos", .data = "short4norm"}),
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GC_ALLOC_INIT(vertex_element_t, {.name = "nor", .data = "short2norm"}),
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GC_ALLOC_INIT(vertex_element_t, {.name = "tex", .data = "short2norm"}),
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},
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3),
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.color_attachments = any_array_create_from_raw(
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(any[]){
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"RGBA64",
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"RGBA64",
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},
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2),
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.depth_attachment = "D32"});
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node_shader_context_t *con_mesh = node_shader_context_create(data, props);
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node_shader_t *kong = node_shader_context_make_kong(con_mesh);
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char *pos = "input.pos";
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node_shader_add_constant(kong, "WVP: float4x4", "_world_view_proj_matrix");
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node_shader_write_attrib_vert(kong, string_join(string_join("output.pos = constants.WVP * float4(", pos), ".xyz, 1.0);"));
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f32 sc = context_raw->brush_scale * context_raw->brush_nodes_scale;
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char *brush_scale = string_join(f32_to_string(sc), "");
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node_shader_add_out(kong, "tex_coord: float2");
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node_shader_write_attrib_vert(kong, string_join(string_join("output.tex_coord = input.tex * float(", brush_scale), ");"));
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node_shader_write_attrib_frag(kong, "var tex_coord: float2 = input.tex_coord;");
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bool decal = context_raw->decal_preview;
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parser_material_sample_keep_aspect = decal;
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gc_unroot(parser_material_sample_uv_scale);
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parser_material_sample_uv_scale = string_copy(brush_scale);
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gc_root(parser_material_sample_uv_scale);
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parser_material_parse_height = make_material_height_used;
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parser_material_parse_height_as_channel = true;
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shader_out_t *sout = parser_material_parse(context_raw->material->canvas, con_mesh, kong, matcon);
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parser_material_parse_height = false;
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parser_material_parse_height_as_channel = false;
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parser_material_sample_keep_aspect = false;
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char *base = sout->out_basecol;
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char *rough = sout->out_roughness;
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char *met = sout->out_metallic;
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char *occ = sout->out_occlusion;
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char *opac = sout->out_opacity;
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char *height = sout->out_height;
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char *nortan = parser_material_out_normaltan;
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node_shader_write_frag(kong, string_join(string_join("var basecol: float3 = pow3(", base), ", float3(2.2, 2.2, 2.2));"));
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node_shader_write_frag(kong, string_join(string_join("var roughness: float = ", rough), ";"));
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node_shader_write_frag(kong, string_join(string_join("var metallic: float = ", met), ";"));
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node_shader_write_frag(kong, string_join(string_join("var occlusion: float = ", occ), ";"));
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node_shader_write_frag(kong, string_join(string_join("var opacity: float = ", opac), ";"));
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node_shader_write_frag(kong, string_join(string_join("var nortan: float3 = ", nortan), ";"));
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node_shader_write_frag(kong, string_join(string_join("var height: float = ", height), ";"));
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if (decal) {
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if (context_raw->tool == TOOL_TYPE_TEXT) {
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node_shader_add_texture(kong, "textexttool", "_textexttool");
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node_shader_write_frag(kong, string_join(string_join("opacity *= sample_lod(textexttool, sampler_linear, tex_coord / float(", brush_scale),
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"), 0.0).r;"));
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}
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}
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if (decal) {
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f32 opac = config_raw->brush_alpha_discard;
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node_shader_write_frag(kong, string_join(string_join("if (opacity <= float(", f32_to_string(opac)), ")) { discard; }"));
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}
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kong->frag_out = "float4[2]";
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kong->frag_n = true;
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node_shader_add_function(kong, str_pack_float_int16);
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node_shader_add_function(kong, str_cotangent_frame);
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node_shader_add_function(kong, str_octahedron_wrap);
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// if (make_material_opac_used) {
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// kong.frag_wvpposition = true;
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// node_shader_add_function(kong, str_dither_bayer);
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// node_shader_write_frag(kong, "var fragcoord1: float2 = float2(input.wvpposition.x / input.wvpposition.w, input.wvpposition.y / input.wvpposition.w) * 0.5 + 0.5;");
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// node_shader_write_frag(kong, "var dither: float = dither_bayer(fragcoord1 * float2(256.0, 256.0));");
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// node_shader_write_frag(kong, "if (opacity < dither) { discard; }");
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// }
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if (make_material_height_used) {
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node_shader_write_frag(kong, "if (height > 0.0) {");
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node_shader_write_frag(kong, "var height_dx: float = ddx(height * 2.0);");
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node_shader_write_frag(kong, "var height_dy: float = ddy(height * 2.0);");
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// Whiteout blend
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node_shader_write_frag(kong, "var n1: float3 = nortan * float3(2.0, 2.0, 2.0) - float3(1.0, 1.0, 1.0);");
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node_shader_write_frag(kong, "var n2: float3 = normalize(float3(height_dx * 16.0, height_dy * 16.0, 1.0));");
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node_shader_write_frag(kong, "nortan = normalize(float3(n1.xy + n2.xy, n1.z * n2.z)) * float3(0.5, 0.5, 0.5) + float3(0.5, 0.5, 0.5);");
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node_shader_write_frag(kong, "}");
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}
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// Apply normal channel
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if (decal) {
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// TODO
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}
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else {
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kong->frag_vvec = true;
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node_shader_write_frag(kong, "var TBN: float3x3 = cotangent_frame(n, vvec, tex_coord);");
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node_shader_write_frag(kong, "n = nortan * 2.0 - 1.0;");
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node_shader_write_frag(kong, "n.y = -n.y;");
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node_shader_write_frag(kong, "n = normalize(TBN * n);");
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}
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node_shader_write_frag(kong, "n = n / (abs(n.x) + abs(n.y) + abs(n.z));");
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// node_shader_write_frag(kong, "n.xy = n.z >= 0.0 ? n.xy : octahedron_wrap(n.xy);");
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node_shader_write_frag(kong, "if (n.z < 0.0) { n.xy = octahedron_wrap(n.xy); }");
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// uint matid = uint(0);
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if (decal) {
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node_shader_write_frag(kong, "output[0] = float4(n.x, n.y, roughness, pack_f32_i16(metallic, uint(0)));"); // metallic/matid
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node_shader_write_frag(kong, "output[1] = float4(basecol, occlusion);");
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}
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else {
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node_shader_write_frag(kong, "output[0] = float4(n.x, n.y, lerp(1.0, roughness, opacity), pack_f32_i16(lerp(1.0, metallic, opacity), uint(0)));"); // metallic/matid
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node_shader_write_frag(kong, "output[1] = float4(lerp3(float3(0.0, 0.0, 0.0), basecol, opacity), occlusion);");
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}
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parser_material_finalize(con_mesh);
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con_mesh->data->shader_from_source = true;
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gpu_create_shaders_from_kong(node_shader_get(kong), ADDRESS(con_mesh->data->vertex_shader), ADDRESS(con_mesh->data->fragment_shader),
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ADDRESS(con_mesh->data->_->vertex_shader_size), ADDRESS(con_mesh->data->_->fragment_shader_size));
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return con_mesh;
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}
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