Oolite Bulletins

Ahruman wrote:

Ahruman wrote:

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

I’d like to highlight the fact that this is awesome.

Ahruman wrote:

I can only provide tools and specifications. We need the artiste himself to explain what the effect maps do. But obviously that requires the new stuff to be complete and the ships to be translated to it first.

Okti wrote:

Will transparency be supported?

• Diffuse colour, normal mapping and specular highlights work. As of r4780, this includes the metallic (self-colouring) effect thanks to the new self_color and scale_factor attributes.
• I haven’t done anything for paint mapping or decals yet. I intend to do paint maps (and remove some of their current limitations). I’m not sure about decals.
•  Also as of r4780, arbitrarily many light maps can be used, as shown. The conditional_color, binding, damage_flicker and simple_mode attributes aren’t implemented yet; when they are, the glows will respond to the environment in the same way as the standard Griff Adder. As it stands, you just get all four effects on full blast. All these light maps work like emission maps; adding illumination_mode = true turns them into illumination maps.

{
    diffuse_map = "oolite-adder-diffuse.png";
    normal_map = "oolite-adder-normal.png";
    specular_color_map =
    {
        name = "oolite-adder-diffuse.png";
        extract_channel = "a";
        self_color = true;  // Modulate specular colour with diffuse colour.
        scale_factor = 6;   // Multiply all channels by a constant.
    };
    specular_exponent = 5;
    
    light_map =
    (
        {
            // Light map 1: lamp/window glow map.
            name = "oolite-adder-effects.png";
            extract_channel = "a";
            
            // Base colour is yellow-white.
            color = (0.9926, 0.9686, 0.7325);
            
            // Turn red (and subtract base green and blue) in combat. Ignored in simple shader mode.
            conditional_color =
            {
                binding = "hasHostileTarget";
                color = (1.5, -0.4, -0.4);
            };
            
            // Flicker on and off while throwing sparks.
            damage_flicker = true;
        },
        {
            // Light map 2: cyan engine glow, full shaders only.
            name = "oolite-adder-effects.png";
            extract_channel = "b";
            color = (0.4, 1.4, 1.8);
            
            // Intensity is controlled by speedFactor.
            binding = "speedFactor";
            
            // Flicker on and off while throwing sparks.
            damage_flicker = true;
            
            // Disable in simple shader mode.
            simple_mode = false;
        },
        {
            // Light map 3: orange engine heat glow, full shaders only.
            name = "oolite-adder-effects.png";
            extract_channel = "r";
            color = (1.5, 0.55, 0.2);
            
            // Intensity is controlled by speedFactor.
            binding = "speedFactor";
            
            // Disable in simple shader mode.
            simple_mode = false;
        },
        {
            // Light map 4: red laser heat glow, full shaders only.
            name = "oolite-adder-effects.png";
            extract_channel = "g";
            color = (1.38, 0.35, 0.20);
            
            // Intensity is controlled by laser temperature.
            binding = "laserHeatLevel";
            
            // Disable in simple shader mode.
            simple_mode = false;
        }
    );
};

Ahruman wrote:

The word “custom” seems to have disappeared.

In 1.76, you get Griffy ships you need to write GLSL. With this, you tell the game what you want and it writes shaders for you. To benefit, you still have to understand what you want, but you don’t need to handle the optics and pixels yourself.

Selezen wrote:

This all sounds like it might actually make shaders accessible to my luddite brain.

Is there any chance of a step-by-step tutorial on how to create shaders under your new regime, Ahruman? Please? It sounds like the old tutorial may be dated now.

Selezen wrote:

This all sounds like it might actually make shaders accessible to my luddite brain.

Is there any chance of a step-by-step tutorial on how to create shaders under your new regime, Ahruman? Please? It sounds like the old tutorial may be dated now.

Smivs wrote:

Selezen wrote:

This all sounds like it might actually make shaders accessible to my luddite brain.

Is there any chance of a step-by-step tutorial on how to create shaders under your new regime, Ahruman? Please? It sounds like the old tutorial may be dated now.

This is something I would also appreciate, as I have no knowledge or understanding of such things. I would even like a simple explanation of the terminology and the functions of these things. Something like the code posted above for the adder but annotated/commented to describe the function of each element.

 documentation for the materials