src/vector2i_ptr.c file

Functions

void vec2i_add_ptr(vector2i* res, const vector2i* a, const vector2i* b): Adds vectors a and b component-wise, storing the result in res.
void vec2i_sub_ptr(vector2i* res, const vector2i* a, const vector2i* b): Subtracts vector b from vector a component-wise, storing the result in res.
void vec2i_mul_scalar_ptr(vector2i* res, const vector2i* v, const vm_int_t s): Multiplies vector v by scalar s component-wise, storing the result in res.
void vec2i_div_scalar_ptr(vector2i* res, const vector2i* v, const vm_int_t s): Divides vector v by scalar s component-wise (float division, truncated to int), storing the result in res.
void vec2i_mul_ptr(vector2i* res, const vector2i* a, const vector2i* b): Multiplies vectors a and b component-wise (Hadamard product), storing the result in res.
void vec2i_neg_ptr(vector2i* res, const vector2i* v): Negates the components of vector v, storing the result in res.
void vec2i_abs_ptr(vector2i* res, const vector2i* v): Computes the absolute values of the components of vector v (using int abs), storing the result in res.
void vec2i_normalize_ptr(vector2i* res, const vector2i* v): Normalizes vector v to approximate unit length (float length computation, truncated to int), storing the result in res.
void vec2i_min_ptr(vector2i* res, const vector2i* a, const vector2i* b): Computes the component-wise minimum of vectors a and b, storing the result in res.
void vec2i_max_ptr(vector2i* res, const vector2i* a, const vector2i* b): Computes the component-wise maximum of vectors a and b, storing the result in res.
void vec2i_sign_ptr(vector2i* res, const vector2i* v): Sets each component of res to the sign of the corresponding component in v (+1, -1, or 0).
void vec2i_perpendicular_ptr(vector2i* res, const vector2i* v): Computes the perpendicular vector to v (90 degrees counterclockwise rotation), storing the result in res.
void vec2i_cross_ptr(vector2i* res, const vector2i* a, const vector2i* b): Computes the 2D cross-product of a and b, storing the scalar value in res->x and 0 in res->y.
static auto vm_div_floor(const vm_int_t a, const vm_int_t b) -> vm_int_t: Floor division toward -inf; returns 0 if b == 0.
static auto vm_mod_floor(const vm_int_t a, const vm_int_t b) -> vm_int_t: Floor modulo matching vm_div_floor.
void vec2i_lerp_ptr(vector2i* res, const vector2i* a, const vector2i* b, const vm_float_t t): Linearly interpolates from a to b by t.
void vec2i_clamp_ptr(vector2i* res, const vector2i* v, const vector2i* min, const vector2i* max): Clamps each component between min and max.
void vec2i_div_ptr(vector2i* res, const vector2i* a, const vector2i* b): Divides two vectors component-wise.
void vec2i_add_scalar_ptr(vector2i* res, const vector2i* v, const vm_int_t s): Adds a scalar to each component.
void vec2i_sub_scalar_ptr(vector2i* res, const vector2i* v, const vm_int_t s): Subtracts a scalar from each component.
void vec2i_mod_ptr(vector2i* res, const vector2i* a, const vector2i* b): Component-wise floor modulo of a by b.
void vec2i_div_floor_ptr(vector2i* res, const vector2i* a, const vector2i* b): Component-wise floored division of a by b.
void vec2i_wrap_ptr(vector2i* res, const vector2i* v, const vector2i* period): Wraps each component of v into [0, period).
void vec2i_to_vec3i_ptr(vector3i* res, const vector2i* v, const vm_int_t z): Converts a vector4i to a vector3i by dropping w.
void vec2i_normalize_to_vec2_ptr(vector2* res, const vector2i* v): Converts to a unit-length vector2.

Function documentation

void vec2i_add_ptr(vector2i* res, const vector2i* a, const vector2i* b)

Adds vectors a and b component-wise, storing the result in res.

Parameters
res	Pointer to result vector2i.
a	Pointer to first vector2i.
b	Pointer to second vector2i.

void vec2i_sub_ptr(vector2i* res, const vector2i* a, const vector2i* b)

Subtracts vector b from vector a component-wise, storing the result in res.

Parameters
res	Pointer to result vector2i.
a	Pointer to first vector2i.
b	Pointer to second vector2i.

void vec2i_mul_scalar_ptr(vector2i* res, const vector2i* v, const vm_int_t s)

Multiplies vector v by scalar s component-wise, storing the result in res.

Parameters
res	Pointer to result vector2i.
v	Pointer to vector2i.
s	Scalar.

void vec2i_div_scalar_ptr(vector2i* res, const vector2i* v, const vm_int_t s)

Divides vector v by scalar s component-wise (float division, truncated to int), storing the result in res.

Parameters
res	Pointer to result vector2i.
v	Pointer to vector2i.
s	Scalar.

Sets vector to zero if s == 0.

void vec2i_mul_ptr(vector2i* res, const vector2i* a, const vector2i* b)

Multiplies vectors a and b component-wise (Hadamard product), storing the result in res.

Parameters
res	Pointer to result vector2i.
a	Pointer to first vector2i.
b	Pointer to second vector2i.

void vec2i_neg_ptr(vector2i* res, const vector2i* v)

Negates the components of vector v, storing the result in res.

Parameters
res	Pointer to result vector2i.
v	Pointer to vector2i.

void vec2i_abs_ptr(vector2i* res, const vector2i* v)

Computes the absolute values of the components of vector v (using int abs), storing the result in res.

Parameters
res	Pointer to result vector2i.
v	Pointer to vector2i.

void vec2i_normalize_ptr(vector2i* res, const vector2i* v)

Normalizes vector v to approximate unit length (float length computation, truncated to int), storing the result in res.

Parameters
res	Pointer to result vector2i.
v	Pointer to vector2i.

Copies v unchanged if the length is zero.

void vec2i_min_ptr(vector2i* res, const vector2i* a, const vector2i* b)

Computes the component-wise minimum of vectors a and b, storing the result in res.

Parameters
res	Pointer to result vector2i.
a	Pointer to first vector2i.
b	Pointer to second vector2i.

void vec2i_max_ptr(vector2i* res, const vector2i* a, const vector2i* b)

Computes the component-wise maximum of vectors a and b, storing the result in res.

Parameters
res	Pointer to result vector2i.
a	Pointer to first vector2i.
b	Pointer to second vector2i.

void vec2i_sign_ptr(vector2i* res, const vector2i* v)

Sets each component of res to the sign of the corresponding component in v (+1, -1, or 0).

Parameters
res	Pointer to result vector2i.
v	Pointer to vector2i.

void vec2i_perpendicular_ptr(vector2i* res, const vector2i* v)

Computes the perpendicular vector to v (90 degrees counterclockwise rotation), storing the result in res.

Parameters
res	Pointer to result vector2i.
v	Pointer to vector2i.

void vec2i_cross_ptr(vector2i* res, const vector2i* a, const vector2i* b)

Computes the 2D cross-product of a and b, storing the scalar value in res->x and 0 in res->y.

Parameters
res	Pointer to result vector2i.
a	Pointer to first vector2i.
b	Pointer to second vector2i.

static vm_int_t vm_div_floor(const vm_int_t a, const vm_int_t b)

Floor division toward -inf; returns 0 if b == 0.

Parameters
a	Dividend.
b	Divisor.
Returns	`floor(a / b)`, or 0 if `b` is 0.

static vm_int_t vm_mod_floor(const vm_int_t a, const vm_int_t b)

Floor modulo matching vm_div_floor.

Parameters
a	Dividend.
b	Divisor.
Returns	Floor modulus.

Result is in [0, b) for b > 0 (or (b, 0] for b < 0); 0 if b == 0.

void vec2i_lerp_ptr(vector2i* res, const vector2i* a, const vector2i* b, const vm_float_t t)

Linearly interpolates from a to b by t.

Parameters
res	Output vector.
a	First input vector.
b	Second input vector.
t	Interpolation factor.

void vec2i_clamp_ptr(vector2i* res, const vector2i* v, const vector2i* min, const vector2i* max)

Clamps each component between min and max.

Parameters
res	Output vector.
v	Input vector.
min	Lower bound.
max	Upper bound.

void vec2i_div_ptr(vector2i* res, const vector2i* a, const vector2i* b)

Divides two vectors component-wise.

Parameters
res	Output vector.
a	First input vector.
b	Second input vector.

void vec2i_add_scalar_ptr(vector2i* res, const vector2i* v, const vm_int_t s)

Adds a scalar to each component.

Parameters
res	Output vector.
v	Input vector.
s	Scalar value.

void vec2i_sub_scalar_ptr(vector2i* res, const vector2i* v, const vm_int_t s)

Subtracts a scalar from each component.

Parameters
res	Output vector.
v	Input vector.
s	Scalar value.

void vec2i_mod_ptr(vector2i* res, const vector2i* a, const vector2i* b)

Component-wise floor modulo of a by b.

Parameters
res	Output vector.
a	First input vector.
b	Second input vector.

void vec2i_div_floor_ptr(vector2i* res, const vector2i* a, const vector2i* b)

Component-wise floored division of a by b.

Parameters
res	Output vector.
a	First input vector.
b	Second input vector.

void vec2i_wrap_ptr(vector2i* res, const vector2i* v, const vector2i* period)

Wraps each component of v into [0, period).

Parameters
res	Output vector.
v	Input vector.
period	Wrap period per component.

void vec2i_to_vec3i_ptr(vector3i* res, const vector2i* v, const vm_int_t z)

Converts a vector4i to a vector3i by dropping w.

Parameters
res	Output vector.
v	Input vector.
z	Z component.

void vec2i_normalize_to_vec2_ptr(vector2* res, const vector2i* v)

Converts to a unit-length vector2.

Parameters
res	Output vector.
v	Input vector.