547 lines
19 KiB
C
547 lines
19 KiB
C
#include "systems.h"
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#include "../game_state.h"
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#include "../input.h"
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#include "../buildings.h"
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#include "../pathfinding.h"
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#include "../unit_ai.h"
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#include "../unit_actions.h"
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#include <rlImGui.h>
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#include <raymath.h>
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#include <rlgl.h>
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Rectangle calculateEntityBounds(Position pos, Size size);
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bool getEntityBounds(ecs_entity_t entity, Position *outPos, Size *outSize, Rectangle *outBounds);
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ecs_entity_t queryEntity(BzSpatialGrid *entityGrid, Vector2 point, ecs_entity_t tag);
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bool pickEntity(BzSpatialGrid *entityGrid, Vector2 point, ecs_entity_t tag);
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void pickUnits(BzSpatialGrid *entityGrid, Rectangle area);
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static void iterateSelectedUnits(ecs_query_t *query, void (*fn)(ecs_entity_t entity, Position *pos, Size *size));
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static void iterRemovePaths(ecs_entity_t entity, Position *pos, Size *size);
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void placeUnits(i32 numUnits, f32 unitSpacing, Vector2 start, Vector2 end, BzTileMap *map, Vector2 **outPlaces);
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void resetInputState(InputState *input) {
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input->cursor = CURSOR_NONE;
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input->state = INPUT_NONE;
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input->building = 0;
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}
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void inputPrimaryAction(Game *game, InputState *input) {
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const MouseButton primaryBtn = input->mapping.primaryBtn;
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if (isInputBtnDragged(input, primaryBtn)) {
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Vector2 start = input->mouseDownWorld;
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Vector2 end = input->mouseWorld;
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if (start.x > end.x) {
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f32 tmp = start.x;
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start.x = end.x;
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end.x = tmp;
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}
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if (start.y > end.y) {
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f32 tmp = start.y;
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start.y = end.y;
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end.y = tmp;
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}
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input->pickArea = (Rectangle) {start.x, start.y, end.x - start.x, end.y - start.y};
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pickUnits(game->entityGrid, input->pickArea);
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}
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i32 selectedCount = ecs_query_entity_count(input->queries.selected);
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if (isInputBtnJustDragged(input, primaryBtn) && selectedCount > 0) {
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resetInputState(input);
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input->state = INPUT_SELECTED_UNITS;
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} else if (isInputBtnJustUp(input, primaryBtn)) {
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if (pickEntity(game->entityGrid, input->mouseDownWorld, ecs_id(Unit))) {
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resetInputState(input);
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input->state = INPUT_SELECTED_UNITS;
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} else if (pickEntity(game->entityGrid, input->mouseDownWorld, Harvestable)) {
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resetInputState(input);
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input->state = INPUT_SELECTED_OBJECT;
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} else if (pickEntity(game->entityGrid, input->mouseDownWorld, Buildable)) {
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resetInputState(input);
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input->state = INPUT_SELECTED_BUILDING;
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}
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selectedCount = ecs_query_entity_count(input->queries.selected);
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}
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if (selectedCount == 0)
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resetInputState(input);
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}
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void inputUnitAction(Game *game, InputState *input) {
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ecs_query_t *query = input->queries.selected;
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BzTileMap *map = &game->map;
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const i32 numUnits = ecs_query_entity_count(query);
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BZ_ASSERT(numUnits > 0);
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const MouseButton actionBtn = input->mapping.secondaryBtn;
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input->cursor = CURSOR_NONE;
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ecs_entity_t taskEntity;
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if ((taskEntity = queryEntity(game->entityGrid, input->mouseWorld, Harvestable))) {
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input->cursor = CURSOR_COLLECT_WOOD;
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if (isInputBtnJustUp(input, actionBtn)) {
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ecs_defer_begin(ECS);
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ecs_iter_t it = ecs_query_iter(ECS, query);
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while (ecs_query_next(&it)) {
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for (i32 i = 0; i < it.count; i++) {
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const ecs_entity_t entity = it.entities[i];
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const Position target = *ecs_get(ECS, taskEntity, Position);
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setUnitAI(entity, game, &(const UnitAI) {
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.type = AI_WORKER_HARVEST,
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.as.workerHarvest.resource = RES_WOOD,
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.as.workerHarvest.target = taskEntity,
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.as.workerHarvest.targetPosition = target
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});
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//addAction(entity, game, &(const Action) {
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// .type = ACTION_MOVE_TO,
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// .as.moveTo.target = target,
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// .as.moveTo.proximityThreshold = 10.0f,
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//});
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//ecs_set(ECS, entity, HarvestTask, {taskEntity});
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goto while_break;
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}
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}
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while_break:
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ecs_iter_fini(&it);
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ecs_defer_end(ECS);
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}
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return;
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}
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if (isInputBtnJustUp(input, actionBtn)) {
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// Note: We mustn't use ecs ecs_remove_all since this will also
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// remove ongoing paths that are not part of this query.
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ecs_defer_begin(ECS);
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iterateSelectedUnits(query, iterRemovePaths);
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ecs_defer_end(ECS);
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const Position target = input->mouseWorld;
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ecs_iter_t it = ecs_query_iter(ECS, query);
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ecs_defer_begin(ECS);
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while (ecs_iter_next(&it)) {
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for (i32 i = 0; i < it.count; i++) {
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const ecs_entity_t entity = it.entities[i];
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clearActions(entity, game);
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addAction(entity, game, &(const Action) {
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.type = ACTION_MOVE_TO,
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.as.moveTo.target = target,
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.as.moveTo.proximityThreshold = 6.0f,
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});
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}
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}
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ecs_defer_end(ECS);
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}
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}
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void updatePlayerInput() {
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f32 dt = GetFrameTime();
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ImGuiIO *io = igGetIO();
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if (io->WantCaptureMouse || io->WantCaptureKeyboard)
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return;
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Game *game = ecs_singleton_get_mut(ECS, Game);
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InputState *input = ecs_singleton_get_mut(ECS, InputState);
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const f32 maxZoom = 4.5f;
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const f32 minZoom = 0.9f;
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float moveSpeed = 100.0f * dt * (1 + maxZoom - game->camera.zoom);
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if (IsKeyDown(KEY_W)) game->camera.target.y -= moveSpeed;
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if (IsKeyDown(KEY_S)) game->camera.target.y += moveSpeed;
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if (IsKeyDown(KEY_A)) game->camera.target.x -= moveSpeed;
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if (IsKeyDown(KEY_D)) game->camera.target.x += moveSpeed;
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if (IsKeyDown(KEY_Q)) game->camera.rotation--;
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if (IsKeyDown(KEY_E)) game->camera.rotation++;
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// https://gamedev.stackexchange.com/questions/9330/zoom-to-cursor-calculation
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float wheel = GetMouseWheelMove();
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if (wheel != 0.0f) {
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const float zoomIncrement = 0.125f;
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f32 oldZoom = game->camera.zoom;
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f32 newZoom = oldZoom + wheel * zoomIncrement;
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newZoom = Clamp(newZoom, minZoom, maxZoom);
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Vector2 mouse = GetMousePosition();
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f32 mapWidth = GetScreenWidth() / oldZoom;
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f32 mapHeight = GetScreenHeight() / oldZoom;
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f32 widthRatio = (mouse.x - (GetScreenWidth() / 2)) / GetScreenWidth();
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f32 newMapWidth = GetScreenWidth() / newZoom;
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f32 newMapHeight = GetScreenHeight() / newZoom;
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f32 heightRatio = (mouse.y - (GetScreenHeight() / 2)) / GetScreenHeight();
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game->camera.target.x += (mapWidth - newMapWidth) * widthRatio;
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game->camera.target.y += (mapHeight - newMapHeight) * heightRatio;
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game->camera.zoom = newZoom;
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}
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// Limit camera to world
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{
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const f32 zoom = game->camera.zoom;
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const f32 width = GetScreenWidth() / zoom;
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const f32 height = GetScreenHeight() / zoom;
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const f32 mapWidth = game->map.width * game->map.tileWidth;
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const f32 mapHeight = game->map.height * game->map.tileHeight;
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game->camera.target.x = Clamp(game->camera.target.x,
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width * 0.5f - game->map.tileWidth,
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mapWidth - width + game->map.tileWidth + width * 0.5f);
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game->camera.target.y = Clamp(game->camera.target.y,
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height * 0.5f - game->map.tileHeight,
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mapHeight - height + game->map.tileHeight + height * 0.5f);
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}
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BzTileMap *map = &game->map;
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BzTile tileX = 0, tileY = 0;
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bzTileMapPosToTile(map, input->mouseWorld, &tileX, &tileY);
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if (IsKeyPressed(input->mapping.backBtn)) {
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ecs_remove_all(ECS, Selected);
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resetInputState(input);
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return;
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}
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const MouseButton primaryBtn = input->mapping.primaryBtn;
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const MouseButton secondaryBtn = input->mapping.secondaryBtn;
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switch (input->state) {
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case INPUT_NONE: {
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inputPrimaryAction(game, input);
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break;
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}
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case INPUT_BUILDING: {
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BZ_ASSERT(input->building);
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BzTile sizeX = 0, sizeY = 0;
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getBuildingSize(input->building, &sizeX, &sizeY);
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bool canPlace = canPlaceBuilding(&game->map, input->building, tileX, tileY);
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if (canPlace && isInputBtnDown(input, primaryBtn)) {
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placeBuilding(&game->map, input->building, tileX, tileY);
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}
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input->buildingCanPlace = canPlace;
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input->buildingPos = (TilePosition) {tileX, tileY};
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input->buildingSize = (TileSize) {sizeX, sizeY};
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break;
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}
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case INPUT_SELECTED_UNITS: {
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inputPrimaryAction(game, input);
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if (input->state != INPUT_SELECTED_UNITS) break;
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inputUnitAction(game, input);
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/*
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i32 selectedCount = ecs_query_entity_count(input->queries.selected);
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if (selectedCount > 1 && isInputBtnJustDragged(input, secondaryBtn)) {
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// TODO: For click it should just move them
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i32 numUnits = selectedCount;
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f32 unitSpacing = 3.5f;
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bzArrayClear(input->unitPositions);
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placeUnits(numUnits, unitSpacing,
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input->mouseDownWorld, input->mouseWorld,
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map, &input->unitPositions);
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BZ_ASSERT(bzArraySize(input->unitPositions) == numUnits);
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i32 unitPosIdx = 0;
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ecs_defer_begin(ECS);
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ecs_defer_end(ECS);
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ecs_iter_t it = ecs_query_iter(ECS, input->queries.selected);
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ecs_defer_begin(ECS);
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while (ecs_iter_next(&it)) {
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Position *pos = ecs_field(&it, Position, 1);
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for (i32 i = 0; i < it.count; i++) {
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ecs_entity_t entity = it.entities[i];
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Position target = bzArrayGet(input->unitPositions, unitPosIdx);
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unitPosIdx++;
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Path path = {NULL, 0};
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pathfindAStar(&(PathfindingDesc) {
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.start=pos[i],
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.target=target,
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.map=map,
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.outPath=&path,
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.pool=game->pools.pathData,
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.alloc=&game->stackAlloc
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});
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if (!path.paths) continue;
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ecs_set_ptr(ECS, entity, Path, &path);
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}
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}
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ecs_defer_end(ECS);
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} else if (isInputBtnJustDown(input, secondaryBtn)) {
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ecs_defer_begin(ECS);
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iterateSelectedUnits(input->queries.selected, iterRemovePaths);
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ecs_defer_end(ECS);
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ecs_iter_t it = ecs_query_iter(ECS, input->queries.selected);
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ecs_defer_begin(ECS);
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while (ecs_iter_next(&it)) {
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Position *pos = ecs_field(&it, Position, 1);
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for (i32 i = 0; i < it.count; i++) {
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ecs_entity_t entity = it.entities[i];
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ecs_remove(ECS, entity, Path);
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Path path = {NULL, 0};
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pathfindAStar(&(PathfindingDesc) {
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.start=pos[i],
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.target=input->mouseWorld,
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.map=map,
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.outPath=&path,
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.pool=game->pools.pathData,
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.alloc=&game->stackAlloc
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});
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if (!path.paths) continue;
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ecs_set_ptr(ECS, entity, Path, &path);
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}
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}
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ecs_defer_end(ECS);
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}
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*/
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break;
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}
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case INPUT_SELECTED_OBJECT: {
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inputPrimaryAction(game, input);
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if (input->state != INPUT_SELECTED_OBJECT) break;
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break;
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}
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case INPUT_SELECTED_BUILDING: {
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inputPrimaryAction(game, input);
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if (input->state != INPUT_SELECTED_BUILDING) break;
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break;
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}
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}
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}
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void drawPlayerInputUIGround() {
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const Game *game = ecs_singleton_get_mut(ECS, Game);
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const InputState *input = ecs_singleton_get_mut(ECS, InputState);
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const MouseButton primaryBtn = input->mapping.primaryBtn;
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const i32 selectedUnitCount = ecs_count_id(ECS, Selected);
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switch (input->state) {
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case INPUT_BUILDING: {
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const Color placeColor = input->buildingCanPlace ?
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(Color) {0, 255, 0, 200} :
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(Color) {255, 0, 0, 200};
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const BzTile width = game->map.tileWidth;
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const BzTile height = game->map.tileHeight;
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DrawRectangleLines(input->buildingPos.x * width,
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input->buildingPos.y * height,
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input->buildingSize.sizeX * width,
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input->buildingSize.sizeY * height, placeColor);
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break;
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}
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case INPUT_SELECTED_UNITS: {
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//BZ_ASSERT(selectedUnitCount);
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/*
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if (selectedUnitCount > 1 && isInputBtnDragged(input, primaryBtn)) {
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i32 numUnits = selectedUnitCount;
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f32 unitSpacing = 3.5f;
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bzArrayClear(input->unitPositions);
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placeUnits(numUnits, unitSpacing, input->mouseDownWorld, input->mouseWorld,
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map, &input->unitPositions);
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BZ_ASSERT(bzArraySize(input->unitPositions) == numUnits);
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bzArrayFor(input->unitPositions, i) {
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Position pos = bzArrayGet(input->unitPositions, i);
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DrawCircle(pos.x, pos.y, 2.0f, ORANGE);
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}
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}
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*/
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break;
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}
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default: break;
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}
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ecs_iter_t it = ecs_query_iter(ECS, input->queries.selected);
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rlSetLineWidth(2.0f);
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while (ecs_query_next(&it)) {
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Position *pos = ecs_field(&it, Position, 1);
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Size *size = ecs_field(&it, Size, 2);
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for (i32 i = 0; i < it.count; i++) {
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f32 radius = size[i].x;
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if (size[i].y > radius)
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radius = size[i].y;
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radius *= 0.5f;
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DrawCircleLines(pos[i].x, pos[i].y, radius, GREEN);
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}
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}
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}
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void drawPlayerInputUI() {
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const Game *game = ecs_singleton_get_mut(ECS, Game);
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const InputState *input = ecs_singleton_get_mut(ECS, InputState);
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const MouseButton primaryBtn = input->mapping.primaryBtn;
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if (isInputBtnDragged(input, primaryBtn)) {
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const Rectangle area = input->pickArea;
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DrawRectangleLines(area.x, area.y, area.width, area.height, RED);
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}
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switch (input->cursor) {
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case CURSOR_COLLECT_WOOD: {
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const Vector2 point = input->mouseWorld;
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DrawCircle(point.x, point.y, 2.0f, RED);
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DrawText("Collect wood", point.x, point.y, 10.0f, RED);
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break;
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}
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default: break;
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}
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}
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Rectangle calculateEntityBounds(Position pos, Size size) {
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return (Rectangle) {
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pos.x - size.x * 0.5f,
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pos.y - size.x * 0.5f,
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size.x, size.y
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};
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}
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bool getEntityBounds(ecs_entity_t entity, Position *outPos, Size *outSize, Rectangle *outBounds) {
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if (!ecs_is_alive(ECS, entity))
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return false;
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const Position *pos = ecs_get(ECS, entity, Position);
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if (!pos)
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return false;
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const Size *size = ecs_get(ECS, entity, Size);
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if (!size)
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return false;
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if (outPos) {
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*outPos = *pos;
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}
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if (outSize) {
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*outSize = *size;
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}
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if (outBounds) {
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*outBounds = (Rectangle) {
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pos->x - size->x * 0.5f,
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pos->y - size->y * 0.5f,
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size->x, size->y
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};
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}
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return true;
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}
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ecs_entity_t queryEntity(BzSpatialGrid *entityGrid, Vector2 point, ecs_entity_t tag) {
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BzSpatialGridIter it = bzSpatialGridIter(entityGrid, point.x, point.y, 0.0f, 0.0f);
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f32 closestDst = INFINITY;
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ecs_entity_t closest = 0;
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while (bzSpatialGridQueryNext(&it)) {
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ecs_entity_t entity = *(ecs_entity_t *) it.data;
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if (!ecs_is_alive(ECS, entity)) continue;
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if (!ecs_has_id(ECS, entity, Selectable)) continue;
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if (!ecs_has_id(ECS, entity, tag)) continue;
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Vector2 pos;
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Rectangle bounds;
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if (!getEntityBounds(entity, &pos, NULL, &bounds)) continue;
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if (!CheckCollisionPointRec(point, bounds)) continue;
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f32 curDst = Vector2Distance(point, pos);
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if (closestDst > curDst) {
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closestDst = curDst;
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closest = entity;
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}
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}
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return closest;
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}
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bool pickEntity(BzSpatialGrid *entityGrid, Vector2 point, ecs_entity_t tag) {
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ecs_remove_all(ECS, Selected);
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const ecs_entity_t entity = queryEntity(entityGrid, point, tag);
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if (entity) {
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ecs_add(ECS, entity, Selected);
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return true;
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}
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return false;
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}
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void pickUnits(BzSpatialGrid *entityGrid, Rectangle area) {
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ecs_remove_all(ECS, Selected);
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BzSpatialGridIter it = bzSpatialGridIter(entityGrid, area.x, area.y, area.width, area.height);
|
|
while (bzSpatialGridQueryNext(&it)) {
|
|
ecs_entity_t entity = *(ecs_entity_t *) it.data;
|
|
if (!ecs_has_id(ECS, entity, ecs_id(Unit))) continue;
|
|
Rectangle bounds;
|
|
if (!getEntityBounds(entity, NULL, NULL, &bounds)) continue;
|
|
|
|
if (!CheckCollisionRecs(area, bounds)) continue;
|
|
ecs_add(ECS, entity, Selected);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static bool isUnitObstructed(f32 x, f32 y, BzTileMap *map) {
|
|
return bzTileMapHasCollision(map, x / map->tileWidth, y / map->tileHeight);
|
|
}
|
|
|
|
static bool canPlaceUnit(Vector2 pos, f32 space, BzTileMap *map) {
|
|
for (i32 y = -1; y <= 1; y++) {
|
|
for (i32 x = -1; x <= 1; x++) {
|
|
if (isUnitObstructed(pos.x + x * space, pos.y + y * space, map))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void placeUnits(i32 numUnits, f32 unitSpacing, Vector2 start, Vector2 end, BzTileMap *map, Vector2 **outPlaces) {
|
|
f32 angle = Vector2Angle(start, end);
|
|
|
|
f32 lineLength = Vector2Distance(start, end);
|
|
|
|
Vector2 pos = Vector2Zero();
|
|
pos.x = unitSpacing;
|
|
|
|
for (i32 i = 0; i < numUnits; i++) {
|
|
if (pos.x + unitSpacing * 2.0f > lineLength) {
|
|
pos.x = unitSpacing;
|
|
pos.y += unitSpacing * 2.0f;
|
|
}
|
|
Vector2 unitPos = Vector2Add(start, Vector2Rotate(pos, angle));
|
|
if (!canPlaceUnit(unitPos, 4.0f, map)) {
|
|
i--;
|
|
} else {
|
|
bzArrayPush(*outPlaces, unitPos);
|
|
}
|
|
pos.x += unitSpacing * 2.0f;
|
|
}
|
|
}
|
|
|
|
static void iterateSelectedUnits(ecs_query_t *query, void (*fn)(ecs_entity_t entity, Position *pos, Size *size)) {
|
|
ecs_iter_t it = ecs_query_iter(ECS, query);
|
|
while (ecs_iter_next(&it)) {
|
|
Position *pos = ecs_field(&it, Position, 1);
|
|
Size *size = ecs_field(&it, Size, 2);
|
|
|
|
for (i32 i = 0; i < it.count; i++) {
|
|
ecs_entity_t entity = it.entities[i];
|
|
|
|
fn(entity, pos + i, size + i);
|
|
}
|
|
}
|
|
}
|
|
static void iterRemovePaths(ecs_entity_t entity, Position *pos, Size *size) {
|
|
ecs_remove(ECS, entity, Path);
|
|
}
|
|
|