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-rw-r--r--dimension/grammar.rules524
1 files changed, 3 insertions, 521 deletions
diff --git a/dimension/grammar.rules b/dimension/grammar.rules
index 2558485..548e769 100644
--- a/dimension/grammar.rules
+++ b/dimension/grammar.rules
@@ -17,128 +17,22 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
*************************************************************************/
-/* Start symbol */
+/*
+ * Start symbol
+ */
SCENE: /* empty */
- | SCENE LANGUAGE_DIRECTIVE
| SCENE SCENE_ITEM {
dmnsn_array_push(astree, &$2);
}
;
-/* Language directives */
-
-LANGUAGE_DIRECTIVE: DECLARATION
-;
-
-DECLARATION: "#declare" "identifier" "=" RVALUE {
- dmnsn_declare_symbol(symtable, $2, $4);
- free($2);
- dmnsn_delete_astnode($4);
- }
- | "#local" "identifier" "=" RVALUE {
- dmnsn_local_symbol(symtable, $2, $4);
- free($2);
- dmnsn_delete_astnode($4);
- }
- | "#undef" "identifier" {
- dmnsn_undef_symbol(symtable, $2);
- free($2);
- }
-;
-
-RVALUE: ARITH_EXPR ";" %dprec 2 {
- $$ = dmnsn_eval($1, symtable);
- dmnsn_delete_astnode($1);
-
- if ($$.type == DMNSN_AST_NONE) {
- dmnsn_delete_astnode($$);
- YYERROR;
- }
- }
- | COLOR ";" %dprec 1
-;
-
-IDENTIFIER: "identifier" {
- $$ = dmnsn_new_astnode(DMNSN_AST_IDENTIFIER, @$);
- $$.ptr = $1;
- }
-;
-
/* Top-level scene item */
SCENE_ITEM: ATMOSPHERIC_EFFECT
| CAMERA
| OBJECT
;
-/* Transformations */
-
-TRANSFORMATION: "rotate" VECTOR {
- $$ = dmnsn_new_astnode1(DMNSN_AST_ROTATION, @$, $2);
- }
- | "scale" VECTOR {
- $$ = dmnsn_new_astnode1(DMNSN_AST_SCALE, @$, $2);
- }
- | "translate" VECTOR {
- $$ = dmnsn_new_astnode1(DMNSN_AST_TRANSLATION, @$, $2);
- }
-;
-
-/* Cameras */
-
-CAMERA: "camera" "{"
- CAMERA_ITEMS
- "}"
- {
- $$ = $3;
- }
-;
-
-CAMERA_ITEMS: /* empty */ {
- $$ = dmnsn_new_astnode(DMNSN_AST_CAMERA, @$);
- }
- | CAMERA_ITEMS CAMERA_ITEM {
- $$ = $1;
- dmnsn_array_push($$.children, &$2);
- }
-;
-
-CAMERA_ITEM: CAMERA_TYPE
- | CAMERA_VECTOR
- | CAMERA_MODIFIER
-;
-
-CAMERA_TYPE: "perspective" {
- $$ = dmnsn_new_astnode(DMNSN_AST_PERSPECTIVE, @$);
- }
-;
-
-CAMERA_VECTOR: "location" VECTOR {
- $$ = dmnsn_new_astnode1(DMNSN_AST_LOCATION, @$, $2);
- }
- | "right" VECTOR {
- $$ = dmnsn_new_astnode1(DMNSN_AST_RIGHT, @$, $2);
- }
- | "up" VECTOR {
- $$ = dmnsn_new_astnode1(DMNSN_AST_UP, @$, $2);
- }
- | "sky" VECTOR {
- $$ = dmnsn_new_astnode1(DMNSN_AST_SKY, @$, $2);
- }
- | "direction" VECTOR {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DIRECTION, @$, $2);
- }
-;
-
-CAMERA_MODIFIER: "angle" FLOAT {
- $$ = dmnsn_new_astnode1(DMNSN_AST_ANGLE, @$, $2);
- }
- | "look_at" VECTOR {
- $$ = dmnsn_new_astnode1(DMNSN_AST_LOOK_AT, @$, $2);
- }
- | TRANSFORMATION
-;
-
/* Atmospheric effects */
ATMOSPHERIC_EFFECT: BACKGROUND
@@ -148,415 +42,3 @@ BACKGROUND: "background" "{" COLOR "}" {
$$ = dmnsn_new_astnode1(DMNSN_AST_BACKGROUND, @$, $3);
}
;
-
-/* Objects */
-
-OBJECT: FINITE_SOLID_OBJECT
- | LIGHT_SOURCE
-;
-
-FINITE_SOLID_OBJECT: BOX
- | SPHERE
-;
-
-BOX: "box" "{"
- VECTOR "," VECTOR
- OBJECT_MODIFIERS
- "}"
- {
- $$ = dmnsn_new_astnode3(DMNSN_AST_BOX, @$, $3, $5, $6);
- }
-;
-
-LIGHT_SOURCE: "light_source" "{"
- VECTOR "," COLOR
- "}"
- {
- $$ = dmnsn_new_astnode2(DMNSN_AST_LIGHT_SOURCE, @$, $3, $5);
- }
-;
-
-SPHERE: "sphere" "{"
- VECTOR "," FLOAT
- OBJECT_MODIFIERS
- "}"
- {
- $$ = dmnsn_new_astnode3(DMNSN_AST_SPHERE, @$, $3, $5, $6);
- }
-;
-
-/* Object modifiers */
-
-OBJECT_MODIFIERS: /* empty */ {
- $$ = dmnsn_new_astnode(DMNSN_AST_OBJECT_MODIFIERS, @$);
- }
- | OBJECT_MODIFIERS OBJECT_MODIFIER {
- $$ = $1;
- dmnsn_array_push($$.children, &$2);
- }
-;
-
-OBJECT_MODIFIER: TRANSFORMATION
- | TEXTURE
- | PIGMENT {
- $$ = dmnsn_new_astnode1(DMNSN_AST_TEXTURE, @$, $1);
- }
-;
-
-/* Textures */
-
-TEXTURE: "texture" "{"
- TEXTURE_ITEMS
- "}"
- { $$ = $3; }
-;
-
-TEXTURE_ITEMS: /* empty */ {
- $$ = dmnsn_new_astnode(DMNSN_AST_TEXTURE, @$);
- }
- | TEXTURE_ITEMS PIGMENT {
- $$ = $1;
- dmnsn_array_push($$.children, &$2);
- }
- | TEXTURE_ITEMS FINISH {
- $$ = $1;
- dmnsn_array_push($$.children, &$2);
- }
-;
-
-/* Pigments */
-
-PIGMENT: "pigment" "{"
- PIGMENT_TYPE
- "}"
- {
- $$ = dmnsn_new_astnode1(DMNSN_AST_PIGMENT, @$, $3);
- }
-;
-
-PIGMENT_TYPE: /* empty */ {
- $$ = dmnsn_new_astnode(DMNSN_AST_NONE, @$);
- }
- | COLOR
-;
-
-/* Finishes */
-FINISH: "finish" "{"
- FINISH_ITEMS
- "}"
- { $$ = $3; }
-;
-
-FINISH_ITEMS: /* empty */ {
- $$ = dmnsn_new_astnode(DMNSN_AST_FINISH, @$);
- }
- | FINISH_ITEMS "ambient" COLOR {
- dmnsn_astnode ambient = dmnsn_new_astnode1(DMNSN_AST_AMBIENT,
- @2, $3);
- $$ = $1;
- dmnsn_array_push($$.children, &ambient);
- }
- | FINISH_ITEMS "diffuse" FLOAT {
- dmnsn_astnode diffuse = dmnsn_new_astnode1(DMNSN_AST_DIFFUSE,
- @2, $3);
- $$ = $1;
- dmnsn_array_push($$.children, &diffuse);
- }
- | FINISH_ITEMS "phong" FLOAT {
- dmnsn_astnode phong = dmnsn_new_astnode1(DMNSN_AST_PHONG, @2, $3);
- $$ = $1;
- dmnsn_array_push($$.children, &phong);
- }
- | FINISH_ITEMS "phong_size" FLOAT {
- dmnsn_astnode phong_size
- = dmnsn_new_astnode1(DMNSN_AST_PHONG_SIZE, @2, $3);
- $$ = $1;
- dmnsn_array_push($$.children, &phong_size);
- }
- | FINISH_ITEMS REFLECTION {
- $$ = $1;
- dmnsn_array_push($$.children, &$2);
- }
-;
-
-REFLECTION: "reflection" "{"
- COLOR
- REFLECTION_ITEMS
- "}"
- {
- ++*$3.refcount;
- $$ = dmnsn_new_astnode3(DMNSN_AST_REFLECTION, @$, $3, $3, $4);
- }
- | "reflection" "{"
- COLOR "," COLOR
- REFLECTION_ITEMS
- "}"
- {
- $$ = dmnsn_new_astnode3(DMNSN_AST_REFLECTION, @$, $3, $5, $6);
- }
-;
-
-REFLECTION_ITEMS: /* empty */ {
- $$ = dmnsn_new_astnode(DMNSN_AST_REFLECTION_ITEMS, @$);
- }
- | REFLECTION_ITEMS "falloff" FLOAT {
- dmnsn_astnode falloff
- = dmnsn_new_astnode1(DMNSN_AST_FALLOFF, @2, $3);
- $$ = $1;
- dmnsn_array_push($$.children, &falloff);
- }
-;
-
-/* Floats */
-
-FLOAT: ARITH_EXPR {
- $$ = dmnsn_eval_scalar($1, symtable);
- dmnsn_delete_astnode($1);
-
- if ($$.type == DMNSN_AST_NONE) {
- dmnsn_delete_astnode($$);
- YYERROR;
- }
- }
-;
-
-FLOAT_LITERAL: "integer" {
- $$ = dmnsn_new_astnode(DMNSN_AST_INTEGER, @$);
- $$.ptr = malloc(sizeof(long));
- if (!$$.ptr)
- dmnsn_error(DMNSN_SEVERITY_HIGH,
- "Failed to allocate room for integer.");
-
- *(long *)$$.ptr = strtol($1, NULL, 0);
- free($1);
- }
- | "float" {
- $$ = dmnsn_new_astnode(DMNSN_AST_FLOAT, @$);
- $$.ptr = malloc(sizeof(double));
- if (!$$.ptr)
- dmnsn_error(DMNSN_SEVERITY_HIGH,
- "Failed to allocate room for float.");
-
- *(double *)$$.ptr = strtod($1, NULL);
- free($1);
- }
-;
-
-/* Vectors */
-
-VECTOR: ARITH_EXPR {
- $$ = dmnsn_eval_vector($1, symtable);
- dmnsn_delete_astnode($1);
-
- if ($$.type == DMNSN_AST_NONE) {
- dmnsn_delete_astnode($$);
- YYERROR;
- }
- }
-;
-
-VECTOR_LITERAL: "<" ARITH_EXPR "," ARITH_EXPR ">" {
- $$ = dmnsn_new_astnode2(DMNSN_AST_VECTOR, @$, $2, $4);
- }
- | "<" ARITH_EXPR "," ARITH_EXPR "," ARITH_EXPR ">" {
- $$ = dmnsn_new_astnode3(DMNSN_AST_VECTOR, @$, $2, $4, $6);
- }
- | "<" ARITH_EXPR "," ARITH_EXPR "," ARITH_EXPR ","
- ARITH_EXPR ">" {
- $$ = dmnsn_new_astnode4(DMNSN_AST_VECTOR, @$, $2, $4, $6, $8);
- }
- | "<" ARITH_EXPR "," ARITH_EXPR "," ARITH_EXPR ","
- ARITH_EXPR "," ARITH_EXPR ">" {
- $$ = dmnsn_new_astnode5(DMNSN_AST_VECTOR, @$,
- $2, $4, $6, $8, $10);
- }
-;
-
-/* Generalized arithmetic expressions */
-
-ARITH_EXPR: FLOAT_LITERAL
- | VECTOR_LITERAL
- | ARITH_EXPR "+" ARITH_EXPR {
- $$ = dmnsn_new_astnode2(DMNSN_AST_ADD, @$, $1, $3);
- }
- | ARITH_EXPR "-" ARITH_EXPR {
- $$ = dmnsn_new_astnode2(DMNSN_AST_SUB, @$, $1, $3);
- }
- | ARITH_EXPR "*" ARITH_EXPR {
- $$ = dmnsn_new_astnode2(DMNSN_AST_MUL, @$, $1, $3);
- }
- | ARITH_EXPR "/" ARITH_EXPR {
- $$ = dmnsn_new_astnode2(DMNSN_AST_DIV, @$, $1, $3);
- }
- | "+" ARITH_EXPR %prec DMNSN_T_NEGATE { $$ = $2; }
- | "-" ARITH_EXPR %prec DMNSN_T_NEGATE {
- $$ = dmnsn_new_astnode1(DMNSN_AST_NEGATE, @$, $2);
- }
- | ARITH_EXPR "." "x" {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DOT_X, @$, $1);
- }
- | ARITH_EXPR "." "u" {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DOT_X, @$, $1);
- }
- | ARITH_EXPR "." "red" {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DOT_X, @$, $1);
- }
- | ARITH_EXPR "." "y" {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DOT_Y, @$, $1);
- }
- | ARITH_EXPR "." "v" {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DOT_Y, @$, $1);
- }
- | ARITH_EXPR "." "green" {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DOT_Y, @$, $1);
- }
- | ARITH_EXPR "." "z" {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DOT_Z, @$, $1);
- }
- | ARITH_EXPR "." "blue" {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DOT_Z, @$, $1);
- }
- | ARITH_EXPR "." "t" {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DOT_T, @$, $1);
- }
- | ARITH_EXPR "." "filter" {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DOT_T, @$, $1);
- }
- | ARITH_EXPR "." "transmit" {
- $$ = dmnsn_new_astnode1(DMNSN_AST_DOT_TRANSMIT, @$, $1);
- }
- | "(" ARITH_EXPR ")" { $$ = $2; }
- | IDENTIFIER
-;
-
-/* Colors */
-
-COLOR: COLOR_BODY {
- $$ = $1;
- $$.type = DMNSN_AST_COLOR;
- }
- | "color" COLOR_BODY {
- $$ = $2;
- $$.type = DMNSN_AST_COLOR;
- }
-;
-
-COLOR_BODY: COLOR_VECTOR %dprec 1
- | COLOR_KEYWORD_GROUP %dprec 2
-;
-
-COLOR_VECTOR: "rgb" VECTOR {
- dmnsn_astnode f, t;
- dmnsn_array_get($2.children, 3, &f);
- dmnsn_array_get($2.children, 4, &t);
- dmnsn_delete_astnode(f);
- dmnsn_delete_astnode(t);
-
- dmnsn_array_resize($2.children, 3);
-
- $$ = dmnsn_eval_vector($2, symtable);
- dmnsn_delete_astnode($2);
- }
- | "rgbf" VECTOR {
- dmnsn_astnode t;
- dmnsn_array_get($2.children, 4, &t);
- dmnsn_delete_astnode(t);
-
- dmnsn_array_resize($2.children, 4);
-
- $$ = dmnsn_eval_vector($2, symtable);
- dmnsn_delete_astnode($2);
- }
- | "rgbt" VECTOR {
- /* Chop off the fifth component */
- dmnsn_astnode t;
- dmnsn_array_get($2.children, 4, &t);
- dmnsn_delete_astnode(t);
-
- dmnsn_array_resize($2.children, 4);
-
- $$ = dmnsn_eval_vector($2, symtable);
- dmnsn_delete_astnode($2);
-
- /* Swap the transmit and filter components */
- dmnsn_astnode temp;
- dmnsn_array_get($$.children, 4, &temp);
- dmnsn_array_set($$.children, 4, dmnsn_array_at($$.children, 3));
- dmnsn_array_set($$.children, 3, &temp);
- }
- | "rgbft" VECTOR { $$ = $2; }
- | VECTOR
-;
-
-COLOR_KEYWORD_GROUP: COLOR_KEYWORD_GROUP_INIT COLOR_KEYWORD_ITEM
- | COLOR_KEYWORD_GROUP COLOR_KEYWORD_ITEM
-;
-
-COLOR_KEYWORD_GROUP_INIT: /* empty */ {
- dmnsn_astnode zero =
- dmnsn_new_astnode(DMNSN_AST_INTEGER, @$);
- zero.ptr = malloc(sizeof(long));
- if (!zero.ptr)
- dmnsn_error(DMNSN_SEVERITY_HIGH,
- "Failed to allocate room for integer.");
- *(long *)zero.ptr = 0;
-
- $$ = dmnsn_eval_vector(zero, symtable);
- dmnsn_delete_astnode(zero);
- }
-;
-
-COLOR_KEYWORD_ITEM: "identifier" {
- dmnsn_astnode *symbol = dmnsn_find_symbol(symtable, $1);
- if (!symbol) {
- dmnsn_diagnostic(@1.first_filename, @1.first_line,
- @1.first_column,
- "unbound identifier '%s'", $1);
- free($1);
- YYERROR;
- } else if (symbol->type != DMNSN_AST_COLOR) {
- dmnsn_astnode eval = dmnsn_eval_vector(*symbol, symtable);
- if (eval.type == DMNSN_AST_NONE) {
- free($1);
- YYERROR;
- }
-
- dmnsn_copy_children($<astnode>0, eval);
- dmnsn_delete_astnode(eval);
- } else {
- dmnsn_copy_children($<astnode>0, *symbol);
- }
-
- free($1);
- }
- | "red" FLOAT {
- dmnsn_astnode old;
- dmnsn_array_get($<astnode>0.children, 0, &old);
- dmnsn_array_set($<astnode>0.children, 0, &$2);
- dmnsn_delete_astnode(old);
- }
- | "green" FLOAT {
- dmnsn_astnode old;
- dmnsn_array_get($<astnode>0.children, 1, &old);
- dmnsn_array_set($<astnode>0.children, 1, &$2);
- dmnsn_delete_astnode(old);
- }
- | "blue" FLOAT {
- dmnsn_astnode old;
- dmnsn_array_get($<astnode>0.children, 2, &old);
- dmnsn_array_set($<astnode>0.children, 2, &$2);
- dmnsn_delete_astnode(old);
- }
- | "filter" FLOAT {
- dmnsn_astnode old;
- dmnsn_array_get($<astnode>0.children, 3, &old);
- dmnsn_array_set($<astnode>0.children, 3, &$2);
- dmnsn_delete_astnode(old);
- }
- | "transmit" FLOAT {
- dmnsn_astnode old;
- dmnsn_array_get($<astnode>0.children, 4, &old);
- dmnsn_array_set($<astnode>0.children, 4, &$2);
- dmnsn_delete_astnode(old);
- }
-;
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-01 02:24:05 +0000