Who chose to use per-pixel lighting?

Blockland Forums > General Discussion

<< < (3/5) > >>

otto-san:
chrisbot is right

Acerblock:
You're right Chris, in fact kompressor is credited for the Oct-Tree in the F1 menu. I didn't know what it was until now, it makes sense. It's actually pretty interesting.

Port:

--- Quote from: Altiris on May 25, 2013, 09:14:43 AM ---With Voxel lighting you don't have that annoying 8 light limit

--- End quote ---

Er, no, the lighting method has nothing to do with light limits.
The reason we have a limit of 8 lights is because the point lighting uses a manually unrolled loop.

--- Code: ---// Point lighting
uniform vec4 pointLightPos0;
uniform vec4 pointLightColor0;
uniform float pointLightRadius0;

uniform vec4 pointLightPos1;
uniform vec4 pointLightColor1;
uniform float pointLightRadius1;

uniform vec4 pointLightPos2;
uniform vec4 pointLightColor2;
uniform float pointLightRadius2;

uniform vec4 pointLightPos3;
uniform vec4 pointLightColor3;
uniform float pointLightRadius3;

uniform vec4 pointLightPos4;
uniform vec4 pointLightColor4;
uniform float pointLightRadius4;

uniform vec4 pointLightPos5;
uniform vec4 pointLightColor5;
uniform float pointLightRadius5;

uniform vec4 pointLightPos6;
uniform vec4 pointLightColor6;
uniform float pointLightRadius6;

uniform vec4 pointLightPos7;
uniform vec4 pointLightColor7;
uniform float pointLightRadius7;

vec4 accumulatePointLights()
{
vec4 pointLightTotal = vec4(0.0f, 0.0f, 0.0f, 0.0f);
vec3 lightDelta = vec3(0.0f, 0.0f, 0.0f);
float lightDot = 0.0f;
float ratio = 0.0f;

// Calculate effects of the 8 point lights.

lightDelta = worldPos.xyz - pointLightPos0.xyz;
lightDot = max(dot(-normalize(lightDelta), worldNormal), 0.0f);
ratio = 1.0f - (length(lightDelta) / pointLightRadius0);
ratio = ratio * ratio * ratio * 0.4f;
ratio = max(ratio, 0.0f);
pointLightTotal.xyz += ratio * lightDot * pointLightColor0.xyz;

lightDelta = worldPos.xyz - pointLightPos1.xyz;
lightDot = max(dot(-normalize(lightDelta), worldNormal), 0.0f);
ratio = 1.0f - (length(lightDelta) / pointLightRadius1);
ratio = ratio * ratio * ratio * 0.4f;
ratio = max(ratio, 0.0f);
pointLightTotal.xyz += ratio * lightDot * pointLightColor1.xyz;

lightDelta = worldPos.xyz - pointLightPos2.xyz;
lightDot = max(dot(-normalize(lightDelta), worldNormal), 0.0f);
ratio = 1.0f - (length(lightDelta) / pointLightRadius2);
ratio = ratio * ratio * ratio * 0.4f;
ratio = max(ratio, 0.0f);
pointLightTotal.xyz += ratio * lightDot * pointLightColor2.xyz;

lightDelta = worldPos.xyz - pointLightPos3.xyz;
lightDot = max(dot(-normalize(lightDelta), worldNormal), 0.0f);
ratio = 1.0f - (length(lightDelta) / pointLightRadius3);
ratio = ratio * ratio * ratio * 0.4f;
ratio = max(ratio, 0.0f);
pointLightTotal.xyz += ratio * lightDot * pointLightColor3.xyz;

lightDelta = worldPos.xyz - pointLightPos4.xyz;
lightDot = max(dot(-normalize(lightDelta), worldNormal), 0.0f);
ratio = 1.0f - (length(lightDelta) / pointLightRadius4);
ratio = ratio * ratio * ratio * 0.4f;
ratio = max(ratio, 0.0f);
pointLightTotal.xyz += ratio * lightDot * pointLightColor4.xyz;

lightDelta = worldPos.xyz - pointLightPos5.xyz;
lightDot = max(dot(-normalize(lightDelta), worldNormal), 0.0f);
ratio = 1.0f - (length(lightDelta) / pointLightRadius5);
ratio = ratio * ratio * ratio * 0.4f;
ratio = max(ratio, 0.0f);
pointLightTotal.xyz += ratio * lightDot * pointLightColor5.xyz;

lightDelta = worldPos.xyz - pointLightPos6.xyz;
lightDot = max(dot(-normalize(lightDelta), worldNormal), 0.0f);
ratio = 1.0f - (length(lightDelta) / pointLightRadius6);
ratio = ratio * ratio * ratio * 0.4f;
ratio = max(ratio, 0.0f);
pointLightTotal.xyz += ratio * lightDot * pointLightColor6.xyz;

lightDelta = worldPos.xyz - pointLightPos7.xyz;
lightDot = max(dot(-normalize(lightDelta), worldNormal), 0.0f);
ratio = 1.0f - (length(lightDelta) / pointLightRadius7);
ratio = ratio * ratio * ratio * 0.4f;
ratio = max(ratio, 0.0f);
pointLightTotal.xyz += ratio * lightDot * pointLightColor7.xyz;

return pointLightTotal;
}

--- End code ---

Greek2me:

--- Quote from: Port on May 25, 2013, 01:28:09 PM ---Er, no, the lighting method has nothing to do with light limits.
The reason we have a limit of 8 lights is because the point lighting uses a manually unrolled loop.

--- End quote ---
Do you remember why he did that?

Brian Smithers:

--- Quote from: Greek2me on May 25, 2013, 01:37:11 PM ---Do you remember why he did that?

--- End quote ---
He was on a lot of meth when he did that.

Navigation

 Message Index

Go to full version