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#include "entity.h"
// Entities.
#include "entities/antifaShip.h"
#include "entities/soldato.h"
#include "entities/caporale.h"
#include "entities/sergente.h"
#include "entities/maresciallo.h"
#include "entities/generale.h"
#include "entities/mussolini.h"
// This fucker is used for creating entities.
const EntityTypeInfo entityTypeInfo[ENTITY_TYPE_COUNT] = {
(EntityTypeInfo){initAntifaShip, closeAntifaShip, updateAntifaShip, drawAntifaShip},
(EntityTypeInfo){initSoldato, closeSoldato, updateSoldato, drawSoldato},
(EntityTypeInfo){initCaporale, closeCaporale, updateCaporale, drawCaporale},
(EntityTypeInfo){initSergente, closeSergente, updateSergente, drawSergente},
(EntityTypeInfo){initMaresciallo, closeMaresciallo, updateMaresciallo, drawMaresciallo},
(EntityTypeInfo){initGenerale, closeGenerale, updateGenerale, drawGenerale},
(EntityTypeInfo){initMussolini, closeMussolini, updateMussolini, drawMussolini}
};
EntityVelocity entityVelocityIdentity() {
return (EntityVelocity){
.velocity = Vector3Zero(),
.angularVelocity = AxisAngleIdentity(),
.stick = Vector3Zero(),
.speed = 0
};
}
float accelerateValue(float value, float lastValue, float up, float down) {
if (value - lastValue >= up)
return lastValue + up;
if (lastValue - value >= down)
return lastValue - down;
return value;
}
Vector3 accelerateVector3(Vector3 value, Vector3 lastValue, Vector3 up, Vector3 down) {
return (Vector3){
accelerateValue(value.x, lastValue.x, up.x, down.x),
accelerateValue(value.y, lastValue.y, up.y, down.y),
accelerateValue(value.z, lastValue.z, up.z, down.z)
};
}
Entity createEntity(EntityType type, Game * game) {
EntityTypeInfo info = entityTypeInfo[type];
// Set defaults.
Entity entity = (Entity){
.type = type,
.position = Vector3Zero(),
.rotation = QuaternionIdentity(),
.velocity = entityVelocityIdentity(),
.lastVelocity = entityVelocityIdentity(),
.useAcceleration = false,
.updateCb = info.updateCb,
.drawCb = info.drawCb,
.data = NULL
};
// Init.
info.initCb(&entity, game);
return entity;
}
void closeEntity(Entity * entity) {
entityTypeInfo[entity->type].closeCb(entity);
}
// Basic wireframe drawing.
void entityDraw(Entity * entity) {
entity->model->transform = QuaternionToMatrix(entity->rotation);
DrawModelWires(
*entity->model,
entity->position,
1,
GREEN
);
}
void entityUpdatePosition(Entity * entity) {
float t = GetFrameTime();
Vector3 velocity = (Vector3){
entity->velocity.velocity.x * t,
entity->velocity.velocity.y * t,
entity->velocity.velocity.z * t
};
entity->position = Vector3Add(entity->position, velocity);
}
void entityUpdateRotation(Entity * entity) {
float t = GetFrameTime();
Quaternion angularRotation = QuaternionFromAxisAngle(
entity->velocity.angularVelocity.axis,
entity->velocity.angularVelocity.angle * t
);
entity->rotation = QuaternionMultiply(entity->rotation, angularRotation);
}
void entityJoystickControl(Entity * entity, Vector3 stick, float speed) {
float s = speed;
Vector3 st = stick;
float t = GetFrameTime();
// Handle acceleration.
if (entity->useAcceleration) {
s = accelerateValue(
speed,
entity->lastVelocity.speed,
entity->acceleration.speedUp * t,
entity->acceleration.speedDown * t
);
st = accelerateVector3(
stick,
entity->lastVelocity.stick,
Vector3Scale(entity->acceleration.rotation, t),
Vector3Scale(entity->acceleration.rotation, t)
);
}
entity->velocity.stick = st;
entity->velocity.speed = s;
entity->lastVelocity = entity->velocity;
// Set angular velocity.
Vector3 angularVelocity = Vector3Scale(st, PI);
entity->velocity.angularVelocity.angle = Vector3Length(angularVelocity);
entity->velocity.angularVelocity.axis = st;
entityUpdateRotation(entity);
// Set position.
Matrix m = QuaternionToMatrix(QuaternionInvert(entity->rotation));
entity->velocity.velocity = (Vector3){
m.m2 * s,
m.m6 * s,
m.m10 * s
};
entityUpdatePosition(entity);
}
void entityFlightToPoint(Entity * entity, Vector3 point, PID * speedPID, float rotationSpeed) {
float t = GetFrameTime();
// Get distance and direction.
Vector3 dis = Vector3Subtract(entity->position, point);
Vector3 direction = Vector3Normalize(dis);
// Get look at and rotation.
Matrix matrix = MatrixLookAt(Vector3Zero(), direction, (Vector3){0.0, 1.0, 0.0});
Quaternion rotation = QuaternionInvert(QuaternionFromMatrix(matrix));
// Rotate this fucker.
if (rotationSpeed == 0.0)
entity->rotation = rotation;
else
entity->rotation = QuaternionSlerp(entity->rotation, rotation, t * rotationSpeed);
// Velocity control.
float s = runPID(0.0, Vector3Length(dis), speedPID);
Matrix m = QuaternionToMatrix(QuaternionInvert(entity->rotation));
// Accelerate.
if (entity->useAcceleration)
s = accelerateValue(
s,
entity->lastVelocity.speed,
entity->acceleration.speedUp * t,
entity->acceleration.speedDown * t
);
// Velocity.
entity->velocity.velocity = (Vector3){
m.m2 * s,
m.m6 * s,
m.m10 * s
};
entityUpdatePosition(entity);
entity->velocity.speed = s;
entity->lastVelocity = entity->velocity;
}
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