CODEWITHSUNDEEP
iphoneopengl-esshaderopengl-es-lighting
tyuip
tyuip

Reputation: 167

Passing own struct into opengl es 2.0 shader

I want to try a lighting example from the book OpenGL ES 2.0 Programming Guide. In the shader they have made two structures. 

struct directional_light   
{  

    vec3 direction; // normalized light direction in eye space  
    vec3 halfplane; // normalized half-plane vector  

    vec4 ambient_color;
    vec4 diffuse_color;
    vec4 specular_color;
};

struct material_properties 
{ 
    vec4 ambient_color; 
    vec4 diffuse_color; 
    vec4 specular_color; 
    float specular_exponent;
};

They have also made two uniforms, based on these structures.

uniform  material_properties u_material_properties;   
uniform directional_light u_directional_light;

The problem is, I do not know how to pass own structures into the actual shader.

I want to create the same structures in my main code and pass the objects into the shader. How is this possible?

Regards Niclas

Upvotes: 11

Views: 8029

Answers (1)

Dr. Snoopy
Dr. Snoopy

Reputation: 56377

You can't, OpenGL ES doesn't have that functionality, to upload you have to get the location of each of your nested variables and call glUniform* on each of them.

For example:

GLuint loc = glGetUniformLocation(program, "u_material_properties.ambient_color");
glUniform4f(loc, 1.0, 1.0, 1.0, 0.0);

Upvotes: 12

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