3D target point rendering method and apparatus, device, and storage medium

1 . A three dimensional (3D) point rendering method, comprising:

selecting a preset number of mesh vertex points in a model as candidate locations for rendering a 3D point, wherein the model comprises a virtual 3D model of an object;

acquiring first depth information of each of the selected mesh vertex points;

determining a non-hidden mesh vertex point from the selected mesh vertex points based on the first depth information;

determining a display size and a rotation angle of the non-hidden mesh vertex point; and

rendering a 3D point at the non-hidden mesh vertex point based on the display size and the rotation angle.

2 . The method according to claim 1 , wherein after selecting the preset number of mesh vertex points in the model, the method further comprises:

acquiring a rotational angular velocity of the model; and

updating the candidate locations for rendering the 3D point in response to the rotational angular velocity being greater than an angular velocity set value.

3 . The method according to claim 2 , wherein acquiring the rotational angular velocity of the model comprises:

acquiring a first rotation Euler angle of the model in a previous frame and acquiring a second rotation Euler angle in a current frame; and

determining the rotational angular velocity of the model based on the first rotation Euler angle and the second rotation Euler angle.

4 . The method according to claim 1 , wherein determining the non-hidden mesh vertex based on the first depth information comprises:

obtaining second depth information of the model;

determining an initial 3D target point with the first depth information less than or equal to the second depth information as the non-hidden mesh vertex point; and

determining an initial 3D target point with the first depth information greater than the second depth information as a hidden mesh vertex point.

5 . The method according to claim 1 , wherein determining the display size of the non-hidden mesh vertex point comprises:

acquiring a size range of the non-hidden mesh vertex point; and

selecting, for each of non-hidden mesh vertex points, a size value within the size range as the display size of the non-hidden mesh vertex point.

6 . The method according to claim 1 , wherein determining the rotation angle of the non-hidden mesh vertex point comprises:

acquiring a first ray direction in which a virtual lamp is projected to a set plane and ray direction a second ray direction in which a center point of the model is projected to the set plane; and

determining an included angle between the first ray direction and the second ray direction as the rotation angle of the non-hidden mesh vertex point.

7 . The method according to claim 1 , wherein rendering the 3D point at the non-hidden mesh vertex point based on the display size and the rotation angle comprises:

rotating the non-hidden mesh vertex point around a center point of the non-hidden mesh vertex point by the rotation angle; and

rendering the rotated non-hidden mesh vertex point based on the display size.

8 . The method according to claim 1 , wherein the rendered 3D point is a point with brightness exceeding a set brightness value.

9 . An electronic device, comprising:

at least one processing apparatus; and

a storage apparatus, configured to store at least one program,

the at least one program, when executed by the at least one processing apparatus, causes electronic device to:

select a preset number of mesh vertex points in a model as candidate locations for rendering a 3D point, wherein the model comprises a virtual 3D model of an object;

acquire first depth information of each of the selected mesh vertex points;

determine a non-hidden mesh vertex point from the selected mesh vertex points based on the first depth information;

determine a display size and a rotation angle of the non-hidden mesh vertex point; and

render a 3D point at the non-hidden mesh vertex point based on the display size and the rotation angle.

10 . A non-transitory computer-readable medium, wherein the computer-readable medium stores a computer program, and the computer program, when executed by a processing apparatus cause the processing apparatus to:

select a preset number of mesh vertex points in a model as candidate locations for rendering a 3D point, wherein the model comprises a virtual 3D model of an object;

acquire first depth information of each of the selected mesh vertex points;

determine a non-hidden mesh vertex point from the selected mesh vertex points based on the first depth information;

determine a display size and a rotation angle of the non-hidden mesh vertex point; and

render a 3D point at the non-hidden mesh vertex point based on the display size and the rotation angle.

11 . The electronic device according to claim 9 , wherein after selecting the preset number of mesh vertex points in the model, the electronic device is further caused to:

acquire a rotational angular velocity of the model; and

update the candidate locations for rendering the 3D point in response to the rotational angular velocity being greater than an angular velocity set value.

12 . The electronic device according to claim 11 , wherein the at least one program causing the electronic device to acquire the rotational angular velocity of the model comprises a program causing the electronic device to:

acquire a first rotation Euler angle of the model in a previous frame and acquiring a second rotation Euler angle in a current frame; and

determine the rotational angular velocity of the model based on the first rotation Euler angle and the second rotation Euler angle.

13 . The electronic device according to claim 9 , wherein the at least one program causing the electronic device to determine the non-hidden mesh vertex point based on the first depth information comprises a program causing the electronic device to:

obtain second depth information of the model;

determine an initial 3D target point with the first depth information less than or equal to the second depth information as the non-hidden mesh vertex point; and

determine an initial 3D target point with the first depth information greater than the second depth information as a hidden mesh vertex point.

14 . The electronic device according to claim 9 , wherein the at least one program causing the electronic device to determine the display size of the non-hidden mesh vertex point comprises a program causing the electronic device to:

acquire a size range of the non-hidden mesh vertex point; and

select, for each of non-hidden mesh vertex points, a size value within the size range as the display size of the non-hidden mesh vertex point.

15 . The electronic device according to claim 9 , wherein the at least one program causing the electronic device to determine the rotation angle of the non-hidden mesh vertex point comprises a program causing the electronic device to:

acquire a first ray direction in which a virtual lamp is projected to a set plane and ray direction a second ray direction in which a center point of the model is projected to the set plane; and

determine an included angle between the first ray direction and the second ray direction as the rotation angle of the non-hidden mesh vertex point.

16 . The electronic device according to claim 9 , wherein the at least one program causing the electronic device to render the 3D point at the non-hidden mesh vertex point based on the display size and the rotation angle comprises a program causing the electronic device to:

rotate the non-hidden mesh vertex point around a center point of the non-hidden mesh vertex point by the rotation angle; and

render the rotated non-hidden mesh vertex point based on the display size.

17 . The electronic device according to claim 9 , wherein the rendered 3D point is a point with brightness exceeding a set brightness value.

18 . The non-transitory storage medium according to claim 10 , wherein after selecting the preset number of mesh vertex points in the target model, the computer program further causes the processing apparatus to:

acquire a rotational angular velocity of the model; and

update the candidate locations for rendering the 3D point in response to the rotational angular velocity being greater than an angular velocity set value.

19 . The non-transitory storage medium according to claim 10 , wherein the computer program causing the processing apparatus to determine the non-hidden mesh vertex point based on the first depth information comprises a program causing the processing apparatus to:

obtain second depth information of the model;

determine an initial 3D target point with the first depth information less than or equal to the second depth information as the non-hidden mesh vertex point; and

determine an initial 3D target point with the first depth information greater than the second depth information as a hidden mesh vertex point.

20 . The non-transitory storage medium according to claim 10 , wherein the computer program causing the processing apparatus to determine the display size of the non-hidden mesh vertex point comprises a program causing the processing apparatus to:

acquire a size range of the non-hidden mesh vertex point; and

select, for each of non-hidden mesh vertex points, a size value within the size range as the display size of the non-hidden mesh vertex point.