protected void renderMultipassLighting(Shader shader, Geometry g, RenderManager rm) {
Renderer r = rm.getRenderer();
LightList lightList = g.getWorldLightList();
Uniform lightDir = shader.getUniform("g_LightDirection");
Uniform lightColor = shader.getUniform("g_LightColor");
Uniform lightPos = shader.getUniform("g_LightPosition");
Uniform ambientColor = shader.getUniform("g_AmbientLightColor");
boolean isFirstLight = true;
boolean isSecondLight = false;
for (int i = 0; i < lightList.size(); i++) {
Light l = lightList.get(i);
if (l instanceof AmbientLight) {
continue;
}
if (isFirstLight) {
// set ambient color for first light only
ambientColor.setValue(VarType.Vector4, getAmbientColor(lightList));
isFirstLight = false;
isSecondLight = true;
} else if (isSecondLight) {
ambientColor.setValue(VarType.Vector4, ColorRGBA.Black);
// apply additive blending for 2nd and future lights
r.applyRenderState(additiveLight);
isSecondLight = false;
}
TempVars vars = TempVars.get();
Quaternion tmpLightDirection = vars.quat1;
Quaternion tmpLightPosition = vars.quat2;
ColorRGBA tmpLightColor = vars.color;
Vector4f tmpVec = vars.vect4f;
ColorRGBA color = l.getColor();
tmpLightColor.set(color);
tmpLightColor.a = l.getType().getId();
lightColor.setValue(VarType.Vector4, tmpLightColor);
switch (l.getType()) {
case Directional:
DirectionalLight dl = (DirectionalLight) l;
Vector3f dir = dl.getDirection();
tmpLightPosition.set(dir.getX(), dir.getY(), dir.getZ(), -1);
lightPos.setValue(VarType.Vector4, tmpLightPosition);
tmpLightDirection.set(0, 0, 0, 0);
lightDir.setValue(VarType.Vector4, tmpLightDirection);
break;
case Point:
PointLight pl = (PointLight) l;
Vector3f pos = pl.getPosition();
float invRadius = pl.getInvRadius();
tmpLightPosition.set(pos.getX(), pos.getY(), pos.getZ(), invRadius);
lightPos.setValue(VarType.Vector4, tmpLightPosition);
tmpLightDirection.set(0, 0, 0, 0);
lightDir.setValue(VarType.Vector4, tmpLightDirection);
break;
case Spot:
SpotLight sl = (SpotLight) l;
Vector3f pos2 = sl.getPosition();
Vector3f dir2 = sl.getDirection();
float invRange = sl.getInvSpotRange();
float spotAngleCos = sl.getPackedAngleCos();
tmpLightPosition.set(pos2.getX(), pos2.getY(), pos2.getZ(), invRange);
lightPos.setValue(VarType.Vector4, tmpLightPosition);
// We transform the spot directoin in view space here to save 5 varying later in the
// lighting shader
// one vec4 less and a vec4 that becomes a vec3
// the downside is that spotAngleCos decoding happen now in the frag shader.
tmpVec.set(dir2.getX(), dir2.getY(), dir2.getZ(), 0);
rm.getCurrentCamera().getViewMatrix().mult(tmpVec, tmpVec);
tmpLightDirection.set(tmpVec.getX(), tmpVec.getY(), tmpVec.getZ(), spotAngleCos);
lightDir.setValue(VarType.Vector4, tmpLightDirection);
break;
default:
throw new UnsupportedOperationException("Unknown type of light: " + l.getType());
}
vars.release();
r.setShader(shader);
r.renderMesh(g.getMesh(), g.getLodLevel(), 1);
}
if (isFirstLight && lightList.size() > 0) {
// There are only ambient lights in the scene. Render
// a dummy "normal light" so we can see the ambient
ambientColor.setValue(VarType.Vector4, getAmbientColor(lightList));
lightColor.setValue(VarType.Vector4, ColorRGBA.BlackNoAlpha);
lightPos.setValue(VarType.Vector4, nullDirLight);
r.setShader(shader);
r.renderMesh(g.getMesh(), g.getLodLevel(), 1);
}
}
public void setLighting(LightList list) {
// XXX: This is abuse of setLighting() to
// apply fixed function bindings
// and do other book keeping.
if (list == null || list.size() == 0) {
glDisable(GL_LIGHTING);
applyFixedFuncBindings(false);
setModelView(worldMatrix, viewMatrix);
return;
}
// Number of lights set previously
int numLightsSetPrev = lightList.size();
// If more than maxLights are defined, they will be ignored.
// The GL1 renderer is not permitted to crash due to a
// GL1 limitation. It must render anything that the GL2 renderer
// can render (even incorrectly).
lightList.clear();
materialAmbientColor.set(0, 0, 0, 0);
for (int i = 0; i < list.size(); i++) {
Light l = list.get(i);
if (l.getType() == Light.Type.Ambient) {
// Gather
materialAmbientColor.addLocal(l.getColor());
} else {
// Add to list
lightList.add(l);
// Once maximum lights reached, exit loop.
if (lightList.size() >= maxLights) {
break;
}
}
}
applyFixedFuncBindings(true);
glEnable(GL_LIGHTING);
fb16.clear();
fb16.put(materialAmbientColor.r)
.put(materialAmbientColor.g)
.put(materialAmbientColor.b)
.put(1)
.flip();
glLightModel(GL_LIGHT_MODEL_AMBIENT, fb16);
if (context.matrixMode != GL_MODELVIEW) {
glMatrixMode(GL_MODELVIEW);
context.matrixMode = GL_MODELVIEW;
}
// Lights are already in world space, so just convert
// them to view space.
glLoadMatrix(storeMatrix(viewMatrix, fb16));
for (int i = 0; i < lightList.size(); i++) {
int glLightIndex = GL_LIGHT0 + i;
Light light = lightList.get(i);
Light.Type lightType = light.getType();
ColorRGBA col = light.getColor();
Vector3f pos;
// Enable the light
glEnable(glLightIndex);
// OGL spec states default value for light ambient is black
switch (lightType) {
case Directional:
DirectionalLight dLight = (DirectionalLight) light;
fb16.clear();
fb16.put(col.r).put(col.g).put(col.b).put(col.a).flip();
glLight(glLightIndex, GL_DIFFUSE, fb16);
glLight(glLightIndex, GL_SPECULAR, fb16);
pos = tempVec.set(dLight.getDirection()).negateLocal().normalizeLocal();
fb16.clear();
fb16.put(pos.x).put(pos.y).put(pos.z).put(0.0f).flip();
glLight(glLightIndex, GL_POSITION, fb16);
glLightf(glLightIndex, GL_SPOT_CUTOFF, 180);
break;
case Point:
PointLight pLight = (PointLight) light;
fb16.clear();
fb16.put(col.r).put(col.g).put(col.b).put(col.a).flip();
glLight(glLightIndex, GL_DIFFUSE, fb16);
glLight(glLightIndex, GL_SPECULAR, fb16);
pos = pLight.getPosition();
fb16.clear();
fb16.put(pos.x).put(pos.y).put(pos.z).put(1.0f).flip();
glLight(glLightIndex, GL_POSITION, fb16);
glLightf(glLightIndex, GL_SPOT_CUTOFF, 180);
if (pLight.getRadius() > 0) {
// Note: this doesn't follow the same attenuation model
// as the one used in the lighting shader.
glLightf(glLightIndex, GL_CONSTANT_ATTENUATION, 1);
glLightf(glLightIndex, GL_LINEAR_ATTENUATION, pLight.getInvRadius() * 2);
glLightf(
glLightIndex,
GL_QUADRATIC_ATTENUATION,
pLight.getInvRadius() * pLight.getInvRadius());
} else {
glLightf(glLightIndex, GL_CONSTANT_ATTENUATION, 1);
glLightf(glLightIndex, GL_LINEAR_ATTENUATION, 0);
glLightf(glLightIndex, GL_QUADRATIC_ATTENUATION, 0);
}
break;
case Spot:
SpotLight sLight = (SpotLight) light;
fb16.clear();
fb16.put(col.r).put(col.g).put(col.b).put(col.a).flip();
glLight(glLightIndex, GL_DIFFUSE, fb16);
glLight(glLightIndex, GL_SPECULAR, fb16);
pos = sLight.getPosition();
fb16.clear();
fb16.put(pos.x).put(pos.y).put(pos.z).put(1.0f).flip();
glLight(glLightIndex, GL_POSITION, fb16);
Vector3f dir = sLight.getDirection();
fb16.clear();
fb16.put(dir.x).put(dir.y).put(dir.z).put(1.0f).flip();
glLight(glLightIndex, GL_SPOT_DIRECTION, fb16);
float outerAngleRad = sLight.getSpotOuterAngle();
float innerAngleRad = sLight.getSpotInnerAngle();
float spotCut = outerAngleRad * FastMath.RAD_TO_DEG;
float spotExpo = 0.0f;
if (outerAngleRad > 0) {
spotExpo = (1.0f - (innerAngleRad / outerAngleRad)) * 128.0f;
}
glLightf(glLightIndex, GL_SPOT_CUTOFF, spotCut);
glLightf(glLightIndex, GL_SPOT_EXPONENT, spotExpo);
if (sLight.getSpotRange() > 0) {
glLightf(glLightIndex, GL_LINEAR_ATTENUATION, sLight.getInvSpotRange());
} else {
glLightf(glLightIndex, GL_LINEAR_ATTENUATION, 0);
}
break;
default:
throw new UnsupportedOperationException("Unrecognized light type: " + lightType);
}
}
// Disable lights after the index
for (int i = lightList.size(); i < numLightsSetPrev; i++) {
glDisable(GL_LIGHT0 + i);
}
// This will set view matrix as well.
setModelView(worldMatrix, viewMatrix);
}
/**
* Uploads the lights in the light list as two uniform arrays.<br>
* <br>
* *
*
* <p><code>uniform vec4 g_LightColor[numLights];</code><br>
* // g_LightColor.rgb is the diffuse/specular color of the light.<br>
* // g_Lightcolor.a is the type of light, 0 = Directional, 1 = Point, <br>
* // 2 = Spot. <br>
* <br>
* <code>uniform vec4 g_LightPosition[numLights];</code><br>
* // g_LightPosition.xyz is the position of the light (for point lights)<br>
* // or the direction of the light (for directional lights).<br>
* // g_LightPosition.w is the inverse radius (1/r) of the light (for attenuation) <br>
*/
protected void updateLightListUniforms(Shader shader, Geometry g, int numLights) {
if (numLights == 0) { // this shader does not do lighting, ignore.
return;
}
LightList lightList = g.getWorldLightList();
Uniform lightColor = shader.getUniform("g_LightColor");
Uniform lightPos = shader.getUniform("g_LightPosition");
Uniform lightDir = shader.getUniform("g_LightDirection");
lightColor.setVector4Length(numLights);
lightPos.setVector4Length(numLights);
lightDir.setVector4Length(numLights);
Uniform ambientColor = shader.getUniform("g_AmbientLightColor");
ambientColor.setValue(VarType.Vector4, getAmbientColor(lightList));
int lightIndex = 0;
for (int i = 0; i < numLights; i++) {
if (lightList.size() <= i) {
lightColor.setVector4InArray(0f, 0f, 0f, 0f, lightIndex);
lightPos.setVector4InArray(0f, 0f, 0f, 0f, lightIndex);
} else {
Light l = lightList.get(i);
ColorRGBA color = l.getColor();
lightColor.setVector4InArray(
color.getRed(), color.getGreen(), color.getBlue(), l.getType().getId(), i);
switch (l.getType()) {
case Directional:
DirectionalLight dl = (DirectionalLight) l;
Vector3f dir = dl.getDirection();
lightPos.setVector4InArray(dir.getX(), dir.getY(), dir.getZ(), -1, lightIndex);
break;
case Point:
PointLight pl = (PointLight) l;
Vector3f pos = pl.getPosition();
float invRadius = pl.getInvRadius();
lightPos.setVector4InArray(pos.getX(), pos.getY(), pos.getZ(), invRadius, lightIndex);
break;
case Spot:
SpotLight sl = (SpotLight) l;
Vector3f pos2 = sl.getPosition();
Vector3f dir2 = sl.getDirection();
float invRange = sl.getInvSpotRange();
float spotAngleCos = sl.getPackedAngleCos();
lightPos.setVector4InArray(pos2.getX(), pos2.getY(), pos2.getZ(), invRange, lightIndex);
lightDir.setVector4InArray(
dir2.getX(), dir2.getY(), dir2.getZ(), spotAngleCos, lightIndex);
break;
case Ambient:
// skip this light. Does not increase lightIndex
continue;
default:
throw new UnsupportedOperationException("Unknown type of light: " + l.getType());
}
}
lightIndex++;
}
while (lightIndex < numLights) {
lightColor.setVector4InArray(0f, 0f, 0f, 0f, lightIndex);
lightPos.setVector4InArray(0f, 0f, 0f, 0f, lightIndex);
lightIndex++;
}
}