Oolite Bulletins

m4r35n357 wrote:

Is this subject to debate

Ahruman wrote:

m4r35n357 wrote:

Is this subject to debate

No. We’ve had the debate, at length, and the decision reached was to make this change after the next stable release (i.e., 1.76).

Gimi wrote:

Is the Q-bomb installed internally, and available on the tab-key?

Ahruman wrote:

it shouldn’t be hard to make an energy bomb OXP.)

 standard materials

• Swizzling. The existing extract_channel attribute is extended to support extracting multiple channels, such as rgb. As a practical example, you might want to use the RGB channels of a texture as the diffuse map, the alpha channel as a specular intensity map, and use a constant specular exponent; this would currently require a custom shader. (You can also reuse channels; for instance, a white/grey ship with red details can use the same channel for green and blue using extract_channel = "rgg".) Unlike the existing extract_channel, which creates a separate texture, the new form is efficient; each texture will only be sampled once per fragment, no matter how the channels are used.
• Orthogonality. With swizzling, it is no longer necessary to use fixed combinations like normal_and_parallax_map, emission_and_illumination_map or specular_map (which requires you to combine specular intensity and specular exponent terms). There will be new parallax_map, specular_intensity_map specular_color_map and specular_exponent_map attributes.
• More parameters. It should be easy to add support for custom scaling factors and offsets to most or all types of texture, and allow them to be randomized and/or bound to ship properties.
• Repeatability. I intend to add support for multiple light maps, of both types. Combined with property bindings, this will allow for things like engine and weapon glow maps.
• Template generation. There’s a  hidden setting to write the generated shaders to the log folder, so you can use the material model as a base for custom shaders.

// Uniforms
uniform sampler2D       uTexture0;


// Varyings
varying vec2            vTexCoords;
varying vec3            vLightVector;


void main(void)
{
    vec3 totalColor = vec3(0.0);
    
    vec2 texCoords = vTexCoords;
    
    // Texture lookups
    vec4 tex0Sample = texture2D(uTexture0, texCoords);  // cobra3_redux.png
    
    vec3 diffuseColor = tex0Sample.bgr;
    
    vec3 lightVector = normalize(vLightVector);
    
    // Diffuse (Lambertian) and ambient lighting
    vec3 diffuseLight = (gl_LightSource[1].diffuse * max(0.0, lightVector.z) + gl_LightModel.ambient).rgb;
    
    totalColor += diffuseColor * diffuseLight;
    gl_FragColor = vec4(totalColor, 1.0);
}

Ahruman wrote:

The overall goal here is to allow most of the effects used by Griff’s ships to be done without custom shaders.

Ahruman wrote:

m4r35n357 wrote:

Is this subject to debate

No. We’ve had the debate, at length, and the decision reached was to make this change after the next stable release (i.e., 1.76).