git » fp-git.git » commit ec0857c

diff --git a/FP/src/ker/states.c b/FP/src/ker/states.c
new file mode 100644
index 0000000..6046571
--- /dev/null
+++ b/FP/src/ker/states.c
@@ -0,0 +1,76 @@
+#include "states.h"
+
+void setNewState(tState* current,tsAction action) {
+
+}
+
+/* public functions interface */
+tState createState(int level) {
+	tState start;
+	static statesLevelList=STATES_LEVEL_LIST;
+	start.animation=stateGetAnimation(levelStatesList[level],&(start.frame));
+	start.currentState=statesActionList[levelStatesList[level]].nextStateId;
+	return start;
+}
+
+/* This function should return the image frame and actions to be performed by this call
+ * returns the animation number corresponding to this frame */
+
+int stateUpdate(tState* current,tKey* key,tMap* map) {
+	int imageFrame=statesAnimationList[current->animation[frame]];
+	if (frame) {
+		current->frame--;
+	} else {
+		int action;
+		/* free(current->animation) */
+		action=evaluateState(current->currentState,key,map);
+		current->animation=stateGetAnimation(action,&(current->frame));
+		current->currentState=statesActionList[action].nextStateId;
+	}
+}
+
+/* privates */
+/* Evaluates a condition indexed in the condition table */
+int evaluateCondition(int condition,tKey* key,tMap* map) {
+	tsCondition c=statesConditionList[condition];
+	switch(c.type) {
+	case esKeyUp:
+	case esKeyDown:
+	case esKeyForward:
+	case esKeyBack:
+	case esShift:
+	case esMapUp:
+	case esMapDown:
+	case esMapForward:
+	case esMapBack:
+	case esMapOn:
+	case esForwardTileNearerThan:
+	case esForwardTileFartherThan:
+	case esInScreen:
+	case esInLevel:
+	case esForwardChangeToScreen:
+		return STATES_CONDRESULT_TRUE;
+	case esLast:
+		return STATES_CONDRESULT_END;
+	default:
+		return STATES_CONDRESULT_FALSE;
+	}
+}
+
+/* Evaluates all conditions needed for an action and returns true or false */
+int evaluateAction(int currentAction,tKey* key,tMap* map) {
+	int i=statesActionList[currentAction].conditionId;
+	int result;
+	while ((result=evaluateCondition(i),key,map)==STATES_CONDRESULT_TRUE) i++;
+	if (result==STATES_CONDRESULT_FALSE) return 0;
+	return 1; /* Only returns true if STATES_CONDRESULT_END is reached */
+}
+
+/* Evaluates a state: all conditions for all actions until a true is found and returns the next state id*/
+int evaluateState(int state, tKey* key, tMap* map) {
+	int i=state;
+	while (!evaluateAction(i,map,key)) i++;
+	return i;
+}
+
+