src/entities/missile.c


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#include "missile.h"
#include "game.h"
#include "assets.h"

// I luv deadly weapons (:

void initMissile(Entity * entity, Game * game) {
    entity->model = &game->assets.models[MISSILE_ASSET];
	entity->collisionModel = entityCreateCollisionModel(*entity->model);
	entity->transformedCollisionModel = entityCreateCollisionModel(*entity->model);
	setEntityRadius(entity);
}

void closeMissile(Entity * entity) {
	entityFreeCollisionModel(entity->collisionModel);
	entityFreeCollisionModel(entity->transformedCollisionModel);
}

void updateMissile(Game * game, Entity * entity) {
    entityUpdateLastValues(entity);

    entityUpdatePosition(entity);

    entityCheckTransformedCollisionModel(entity);
}

void drawMissile(Game * game, Entity * entity) {
    entityDraw(entity);
}

void aimMissileAtTarget(Entity * entity, Vector3 target) {
    setMissileDirection(entity, Vector3Normalize(Vector3Subtract(entity->position, target)));
}

void setMissileDirection(Entity * entity, Vector3 direction) {
    // Get look at matrix and rotation.
    Matrix matrix = MatrixLookAt(Vector3Zero(), direction, (Vector3){0.0, 1.0, 0.0});
	entity->rotation = QuaternionInvert(QuaternionFromMatrix(matrix));

    // Set velocity.
    entity->velocity.velocity = (Vector3){
        matrix.m2 * MISSILE_SPEED,
		matrix.m6 * MISSILE_SPEED,
		matrix.m10 * MISSILE_SPEED
    };
}