diff options
| -rw-r--r-- | src/glsl/ir_constant_expression.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp index e68a7b1a2a2..52f53d9ff48 100644 --- a/src/glsl/ir_constant_expression.cpp +++ b/src/glsl/ir_constant_expression.cpp @@ -854,7 +854,13 @@ ir_call::constant_expression_value() for (unsigned c = 0; c < op[0]->type->components(); c++) data.f[c] = 180.0/M_PI * op[0]->value.f[c]; } else if (strcmp(callee, "distance") == 0) { - return NULL; /* FINISHME: implement this */ + assert(op[0]->type->is_float() && op[1]->type->is_float()); + float length_squared = 0.0; + for (unsigned c = 0; c < op[0]->type->components(); c++) { + float t = op[0]->value.f[c] - op[1]->value.f[c]; + length_squared += t * t; + } + return new(mem_ctx) ir_constant(sqrtf(length_squared)); } else if (strcmp(callee, "dot") == 0) { expr = new(mem_ctx) ir_expression(ir_binop_dot, type, op[0], op[1]); } else if (strcmp(callee, "equal") == 0) { |