From a3bc328a649512ae786dfe1934408c3e398b1c78 Mon Sep 17 00:00:00 2001
From: kozec <kozec@kozec.com>
Date: Mon, 13 Jul 2020 21:19:14 +0200
Subject: [PATCH] Implemented RotationModifier. Fixes #570

---
 src/actions/rotate_input.c | 100 +++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 src/actions/rotate_input.c

diff --git a/src/actions/rotate_input.c b/src/actions/rotate_input.c
new file mode 100644
index 000000000..277311664
--- /dev/null
+++ b/src/actions/rotate_input.c
@@ -0,0 +1,100 @@
+/**
+ * SC Controller - Rotate Input modifier
+ *
+ * Rotates touch or stick input along 'Z' axis
+*/
+#include "scc/utils/logging.h"
+#include "scc/utils/strbuilder.h"
+#include "scc/utils/math.h"
+#include "scc/utils/rc.h"
+#include "scc/param_checker.h"
+#include "scc/action.h"
+#include "tostring.h"
+#include "props.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+static ParamChecker pc;
+
+static const char* KW_ROTATE = "rotate";
+
+typedef struct {
+	Action				action;
+	Action*				child;
+	ParameterList		params;
+	float				angle;
+} RotateInputModifier;
+
+ACTION_MAKE_TO_STRING(RotateInputModifier, rotate_input, KW_ROTATE, &pc);
+
+static char* describe(Action* a, ActionDescContext ctx) {
+	RotateInputModifier* r = container_of(a, RotateInputModifier, action);
+	return scc_action_get_description(r->child, ctx);
+}
+
+static void rotate_input_dealloc(Action* a) {
+	RotateInputModifier* r = container_of(a, RotateInputModifier, action);
+	list_free(r->params);
+	RC_REL(r->child);
+	free(r);
+}
+
+static void whole(Action* a, Mapper* m, AxisValue x, AxisValue y, PadStickTrigger what) {
+	RotateInputModifier* r = container_of(a, RotateInputModifier, action);
+	float angle = r->angle * M_PI / -180.0;
+	float rx = (float)x * cos(angle) - (float)y * sin(angle);
+	float ry = (float)x * sin(angle) + (float)y * cos(angle);
+	if (r->child->whole != NULL)
+		r->child->whole(r->child, m, rx, ry, what);
+}
+
+static Action* compress(Action* a) {
+	RotateInputModifier* r = container_of(a, RotateInputModifier, action);
+	scc_action_compress(&r->child);
+	return a;
+}
+
+static Action* get_child(Action* a) {
+	RotateInputModifier* r = container_of(a, RotateInputModifier, action);
+	RC_ADD(r->child);
+	return r->child;
+}
+
+static Parameter* get_property(Action* a, const char* name) {
+	RotateInputModifier* r = container_of(a, RotateInputModifier, action);
+	MAKE_FLOAT_PROPERTY(r->angle, "angle");
+	
+	DWARN("Requested unknown property '%s' from '%s'", name, a->type);
+	return NULL;
+}
+
+
+static ActionOE rotate_input_constructor(const char* keyword, ParameterList params) {
+	ParamError* err = scc_param_checker_check(&pc, keyword, params);
+	if (err != NULL) return (ActionOE)err;
+	params = scc_param_checker_fill_defaults(&pc, params);
+	if (params == NULL) return (ActionOE)scc_oom_action_error();
+	
+	RotateInputModifier* r = malloc(sizeof(RotateInputModifier));
+	if (r == NULL) return (ActionOE)scc_oom_action_error();
+	scc_action_init(&r->action, KW_ROTATE, AF_MODIFIER,
+				&rotate_input_dealloc, &rotate_input_to_string);
+	r->action.get_property = &get_property;
+	r->action.compress = &compress;
+	r->action.describe = &describe;
+	r->action.whole = &whole;
+	r->action.extended.get_child = &get_child;
+	
+	r->child = scc_parameter_as_action(list_get(params, 1));
+	r->angle = scc_parameter_as_float(list_get(params, 0));
+	r->params = params;
+	RC_ADD(r->child);
+	return (ActionOE)&r->action;
+}
+
+
+void scc_actions_init_rotate_input() {
+	scc_param_checker_init(&pc, "fa");
+	scc_action_register(KW_ROTATE, &rotate_input_constructor);
+}
+