void WaterMaterialGenerator::individualFragmentProgramParams(Ogre::GpuProgramParametersSharedPtr params)
{
// can't set a vector2, need to pack it in vector3
#define _vec3(prop) Vector3(prop.x, prop.y, 1.0)
params->setIgnoreMissingParams(true);
params->setNamedConstant("enableShadows", Real(1.f));
params->setNamedConstant("waveBump_Speed_HighFreq_Spec", mDef->mProps->waveBump_Speed_HighFreq_Spec);
params->setNamedConstant("depthPars", mDef->mProps->depthPars);
params->setNamedConstant("depthColor", mDef->mProps->depthColour);
params->setNamedConstant("deepColor", mDef->mProps->deepColour);
params->setNamedConstant("shallowColor", mDef->mProps->shallowColour);
params->setNamedConstant("reflectionColor", mDef->mProps->reflectionColour);
params->setNamedConstant("matSpec", mDef->mProps->specular);
params->setNamedConstant("reflVal_Refl2_Distort_Opacity", mDef->mProps->reflVal_Refl2_Distort_Opacity);
params->setNamedConstant("fresnelPowerBias", Vector3(mDef->mProps->fresnelPower, mDef->mProps->fresnelBias, 0));
if (needShadows())
{
params->setNamedConstant("pssmSplitPoints", mParent->pApp->splitPoints);
for (int i=0; i<mParent->getNumShadowTex(); ++i)
params->setNamedAutoConstant("invShadowMapSize"+toStr(i), GpuProgramParameters::ACT_INVERSE_TEXTURE_SIZE, i+mShadowTexUnit_start);
}
}
void WaterMaterialGenerator::individualVertexProgramParams(Ogre::GpuProgramParametersSharedPtr params)
{
params->setIgnoreMissingParams(true); //! workaround 'Parameter texWorldViewProjMatrix0 does not exist' - no idea why its happening
if (needShadows())
for (int i=0; i<mParent->getNumShadowTex(); ++i)
{
params->setNamedAutoConstant("texWorldViewProjMatrix"+toStr(i), GpuProgramParameters::ACT_TEXTURE_WORLDVIEWPROJ_MATRIX, i);
}
}
void GrassLayerBase::_updateShaders()
{
if (shaderNeedsUpdate) {
shaderNeedsUpdate = false;
//Proceed only if there is no custom vertex shader and the user's computer supports vertex shaders
const RenderSystemCapabilities *caps = Root::getSingleton().getRenderSystem()->getCapabilities();
if (caps->hasCapability(RSC_VERTEX_PROGRAM) && geom->getShadersEnabled()) {
//Calculate fade range
float farViewDist = geom->getDetailLevels().front()->getFarRange();
float fadeRange = farViewDist / 1.2247449f;
//Note: 1.2247449 ~= sqrt(1.5), which is necessary since the far view distance is measured from the centers
//of pages, while the vertex shader needs to fade grass completely out (including the closest corner)
//before the page center is out of range.
//Generate a string ID that identifies the current set of vertex shader options
StringUtil::StrStreamType tmpName;
tmpName << "GrassVS_";
if (animate)
tmpName << "anim_";
if (blend)
tmpName << "blend_";
if (lighting)
tmpName << "lighting_";
tmpName << renderTechnique << "_";
tmpName << fadeTechnique << "_";
if (fadeTechnique == FADETECH_GROW || fadeTechnique == FADETECH_ALPHAGROW)
tmpName << maxHeight << "_";
tmpName << farViewDist << "_";
tmpName << "vp";
const String vsName = tmpName.str();
//Generate a string ID that identifies the material combined with the vertex shader
const String matName = material->getName() + "_" + vsName;
//Check if the desired material already exists (if not, create it)
MaterialPtr tmpMat = MaterialManager::getSingleton().getByName(matName);
if (tmpMat.isNull()) {
//Clone the original material
tmpMat = material->clone(matName);
//Disable lighting
tmpMat->setLightingEnabled(false);
//tmpMat->setReceiveShadows(false);
//Check if the desired shader already exists (if not, compile it)
String shaderLanguage = ShaderHelper::getShaderLanguage();
HighLevelGpuProgramPtr vertexShader = HighLevelGpuProgramManager::getSingleton().getByName(vsName);
if (vertexShader.isNull()) {
//Generate the grass shader
String vertexProgSource;
if (!shaderLanguage.compare("hlsl") || !shaderLanguage.compare("cg")) {
vertexProgSource = "void main( \n"
" float4 iPosition : POSITION, \n"
" float4 iColor : COLOR, \n"
" float2 iUV : TEXCOORD0, \n"
" out float4 oPosition : POSITION, \n"
" out float4 oColor : COLOR, \n"
" out float2 oUV : TEXCOORD0, \n";
if (lighting)
vertexProgSource += " uniform float4 objSpaceLight, \n"
" uniform float4 lightDiffuse, \n"
" uniform float4 lightAmbient, \n";
if (animate)
vertexProgSource += " uniform float time, \n"
" uniform float frequency, \n"
" uniform float4 direction, \n";
if (fadeTechnique == FADETECH_GROW || fadeTechnique == FADETECH_ALPHAGROW)
vertexProgSource += " uniform float grassHeight, \n";
if (renderTechnique == GRASSTECH_SPRITE || lighting)
vertexProgSource += " float4 iNormal : NORMAL, \n";
vertexProgSource += " uniform float4x4 worldViewProj, \n"
" uniform float3 camPos, \n"
" uniform float fadeRange ) \n"
"{ \n"
" oColor.rgb = iColor.rgb; \n"
" float4 position = iPosition; \n"
" float dist = distance(camPos.xz, position.xz); \n";
if (lighting) {
vertexProgSource += " float3 light = normalize(objSpaceLight.xyz - (iPosition.xyz * objSpaceLight.w)); \n"
" float diffuseFactor = max(dot(float4(0,1,0,0), light), 0); \n"
" oColor = (lightAmbient + diffuseFactor * lightDiffuse) * iColor; \n";
} else {
vertexProgSource += " oColor.rgb = iColor.rgb; \n";
}
if (fadeTechnique == FADETECH_ALPHA || fadeTechnique == FADETECH_ALPHAGROW)
vertexProgSource +=
//Fade out in the distance
" oColor.a = 2.0f - (2.0f * dist / fadeRange); \n";
else
vertexProgSource += " oColor.a = 1.0f; \n";
vertexProgSource += " float oldposx = position.x; \n";
if (renderTechnique == GRASSTECH_SPRITE)
vertexProgSource +=
//Face the camera
" float3 dirVec = (float3)position - (float3)camPos; \n"
" float3 p = normalize(cross(float4(0,1,0,0), dirVec)); \n"
" position += float4(p.x * iNormal.x, iNormal.y, p.z * iNormal.x, 0); \n";
if (animate)
vertexProgSource += " if (iUV.y == 0.0f){ \n"
//Wave grass in breeze
" float offset = sin(time + oldposx * frequency); \n"
" position += direction * offset; \n"
" } \n";
if (blend && animate)
vertexProgSource += " else { \n";
else if (blend)
vertexProgSource += " if (iUV.y != 0.0f){ \n";
if (blend)
vertexProgSource +=
//Blend the base of nearby grass into the terrain
" oColor.a = clamp(oColor.a, 0, 1) * 4.0f * ((dist / fadeRange) - 0.1f); \n"
" } \n";
if (fadeTechnique == FADETECH_GROW || fadeTechnique == FADETECH_ALPHAGROW)
vertexProgSource += " float offset = (2.0f * dist / fadeRange) - 1.0f; \n"
" position.y -= grassHeight * clamp(offset, 0, 1); ";
vertexProgSource += " oPosition = mul(worldViewProj, position); \n";
vertexProgSource += " oUV = iUV;\n"
"}";
} else {
//Must be glsl
if (lighting) {
vertexProgSource = "uniform vec4 objSpaceLight; \n"
"uniform vec4 lightDiffuse; \n"
"uniform vec4 lightAmbient; \n";
}
if (animate) {
vertexProgSource += "uniform float time; \n"
"uniform float frequency; \n"
"uniform vec4 direction; \n";
}
if (fadeTechnique == FADETECH_GROW || fadeTechnique == FADETECH_ALPHAGROW) {
vertexProgSource += "uniform float grassHeight; \n";
}
vertexProgSource += "uniform vec3 camPos; \n"
"uniform float fadeRange; \n"
"\n"
"void main()"
"{ \n"
" vec4 color = gl_Color; \n"
" vec4 position = gl_Vertex; \n"
" float dist = distance(camPos.xz, position.xz); \n";
if (lighting) {
vertexProgSource += " vec3 light = normalize(objSpaceLight.xyz - (gl_Vertex.xyz * objSpaceLight.w)); \n"
" float diffuseFactor = max( dot( vec3(0.0,1.0,0.0), light), 0.0); \n"
" color = (lightAmbient + diffuseFactor * lightDiffuse) * gl_Color; \n";
} else {
vertexProgSource += " color.xyz = gl_Color.xyz; \n";
}
if (fadeTechnique == FADETECH_ALPHA || fadeTechnique == FADETECH_ALPHAGROW) {
vertexProgSource +=
//Fade out in the distance
" color.w = 2.0 - (2.0 * dist / fadeRange); \n";
} else {
vertexProgSource += " color.w = 1.0; \n";
}
if (renderTechnique == GRASSTECH_SPRITE) {
vertexProgSource +=
//Face the camera
" vec3 dirVec = position.xyz - camPos.xyz; \n"
" vec3 p = normalize(cross(vec3(0.0,1.0,0.0), dirVec)); \n"
" position += vec4(p.x * gl_Normal.x, gl_Normal.y, p.z * gl_Normal.x, 0.0); \n";
}
if (animate) {
vertexProgSource += " if (gl_MultiTexCoord0.y == 0.0) \n"
" { \n"
//Wave grass in breeze
" position += direction * sin(time + gl_Vertex.x * frequency); \n"
" } \n";
}
if (blend && animate) {
vertexProgSource += " else \n"
" { \n";
} else if (blend) {
vertexProgSource += " if (gl_MultiTexCoord0.y != 0.0) \n"
" { \n";
}
if (blend) {
vertexProgSource +=
//Blend the base of nearby grass into the terrain
" color.w = clamp(color.w, 0.0, 1.0) * 4.0 * ((dist / fadeRange) - 0.1); \n"
" } \n";
}
if (fadeTechnique == FADETECH_GROW || fadeTechnique == FADETECH_ALPHAGROW) {
vertexProgSource += " position.y -= grassHeight * clamp((2.0 * dist / fadeRange) - 1.0, 0.0, 1.0); \n";
}
vertexProgSource += " gl_Position = gl_ModelViewProjectionMatrix * position; \n"
" gl_FrontColor = color; \n"
" gl_TexCoord[0] = gl_MultiTexCoord0; \n";
if (geom->getSceneManager()->getFogMode() == Ogre::FOG_EXP2) {
vertexProgSource += " gl_FogFragCoord = clamp(exp(- gl_Fog.density * gl_Fog.density * gl_Position.z * gl_Position.z), 0.0, 1.0); \n";
} else {
vertexProgSource += " gl_FogFragCoord = gl_Position.z; \n";
}
vertexProgSource += "}";
}
vertexShader = HighLevelGpuProgramManager::getSingleton().createProgram(vsName, ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, shaderLanguage, GPT_VERTEX_PROGRAM);
vertexShader->setSource(vertexProgSource);
if (shaderLanguage == "hlsl") {
vertexShader->setParameter("target", "vs_1_1");
vertexShader->setParameter("entry_point", "main");
} else if (shaderLanguage == "cg") {
vertexShader->setParameter("profiles", "vs_1_1 arbvp1");
vertexShader->setParameter("entry_point", "main");
}
// GLSL can only have one entry point "main".
vertexShader->load();
}
//Now the vertex shader (vertexShader) has either been found or just generated
//(depending on whether or not it was already generated).
tmpMat->load();
Ogre::Material::TechniqueIterator techIterator = tmpMat->getSupportedTechniqueIterator();
while (techIterator.hasMoreElements()) {
Ogre::Technique* tech = techIterator.getNext();
//Apply the shader to the material
Pass *pass = tech->getPass(0);
pass->setVertexProgram(vsName);
GpuProgramParametersSharedPtr params = pass->getVertexProgramParameters();
if (shaderLanguage.compare("glsl"))
//glsl can use the built in gl_ModelViewProjectionMatrix
params->setNamedAutoConstant("worldViewProj", GpuProgramParameters::ACT_WORLDVIEWPROJ_MATRIX);
params->setNamedAutoConstant("camPos", GpuProgramParameters::ACT_CAMERA_POSITION_OBJECT_SPACE);
params->setNamedAutoConstant("fadeRange", GpuProgramParameters::ACT_CUSTOM, 1);
if (animate) {
params->setNamedConstant("time", 1.0f);
params->setNamedConstant("frequency", 1.0f);
params->setNamedConstant("direction", Ogre::Vector4::ZERO);
}
if (lighting) {
params->setNamedAutoConstant("objSpaceLight", GpuProgramParameters::ACT_LIGHT_POSITION_OBJECT_SPACE);
params->setNamedAutoConstant("lightDiffuse", GpuProgramParameters::ACT_DERIVED_LIGHT_DIFFUSE_COLOUR);
params->setNamedAutoConstant("lightAmbient", GpuProgramParameters::ACT_DERIVED_AMBIENT_LIGHT_COLOUR);
}
if (fadeTechnique == FADETECH_GROW || fadeTechnique == FADETECH_ALPHAGROW) {
params->setNamedConstant("grassHeight", maxHeight * 1.05f);
}
pass->getVertexProgramParameters()->setNamedConstant("fadeRange", fadeRange);
}
}
//Now the material (tmpMat) has either been found or just created (depending on whether or not it was already
//created). The appropriate vertex shader should be applied and the material is ready for use.
//Apply the new material
material = tmpMat;
}
Ogre::Technique* tech = material->getBestTechnique();
if (tech && tech->getNumPasses()) {
Ogre::Pass* pass = tech->getPass(0);
if (pass->hasVertexProgram()) {
Ogre::GpuProgramParametersSharedPtr params = pass->getVertexProgramParameters();
if (!params.isNull()) {
params->setIgnoreMissingParams(true);
}
}
}
}
}
