tree party with out leafs by 3d point in space11th Sep 2009 21:18
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Summary Tree party update where leaf don't fall Description I thought it would be nice to have tree party with out those anoying leaves falling all the time. Code ` This code was downloaded from The Game Creators
` It is reproduced here with full permission
` http://www.thegamecreators.com
void DarkGDK ( void )
{
...
// load images for the terrain
//dbLoadImage ( "demomedia\terrain\texture.jpg", 1 ); // diffuse texture
//dbLoadImage ( "demomedia\terrain\texture2.jpg", 3 ); // diffuse texture
//dbLoadImage ( "demomedia\terrain\detail.jpg", 2 ); // detail texture
...
}
...
void tpUpdate( int camobj ){
if ( dtMasterTreeCount < 1 ) { return; } // no trees loaded? exit out
//check if the system is initialized
if ( dtInit != true ){ MessageBox(NULL, "Treeparty was not initialized, call the method 'dt_Init()' to initialize the system.", "Error!", MB_OK); exit(0); }
// misc local vars
int lodcheck, aval, cnt;
float applyamt, decamt;
float dist, nlx, nly, nlz;
float lx=0.0, ly=0.0, lz=0.0;
char* str1 = "";
char* str2 = "";
char* str3;
int inview;
// misc resets
totinview = 0; dtWobble = dtWobble + dtWobbleEffect;
// see if lod timer has expired
if ( dtLODTimer < dbTimer() ){
lodcheck = 1;
dtLODTimer = dbTimer() + 75; }
else{
lodcheck = 0;
}
// random wind gust variables
if ( (dtRandWindGustChance > 0) && ( dtWindOnOff = 1 ) ){
float applyamt2;
float decamt;
if ( dtGustTimer < dbTimer()){
if ( dbRnd(dtRandWindGustChance) == dbRnd(dtRandWindGustChance) ){
dbRandomize(dbTimer());
//get random force value
applyamt = tprandFloat( dtRandWindGustMaxForce/2 , dtRandWindGustMaxForce );
applyamt2= tprandFloat( dtRandWindGustMaxSpeed/2, dtRandWindGustMaxSpeed );
decamt = tprandFloat(0.001, 0.01);
tpStartWindGust( applyamt, applyamt2, decamt);
dtGustTimer = dbTimer() + ( 5000 + dbRnd(15000) );
}
}
}
// monitor wind gust variables
if ( dtWindGustForceReq > 0 ){
dtWindGustForce = dtWindGustForce+ dtWindGustDecForce;
dtWindGustForceReq = (dtWindGustForceReq - dtWindGustDecForce );
}
if ( dtWindGustForce > 0 ){
dtWindGustForce = dtWindGustForce - (dtWindGustForce * .0035);
if ( dtWindGustForce < .01 ) { dtWindGustForce = 0; }
}
if ( dtWindGustSpeedReq > 0 ){
dtWindGustSpeed = dtWindGustSpeed + dtWindGustDecSpeed;
dtWindGustSpeedReq = (dtWindGustSpeedReq - dtWindGustDecSpeed );
}
if ( dtWindGustSpeed > 0 ){
dtWindGustSpeed = dtWindGustSpeed - (dtWindGustSpeed * .0015);
if ( dtWindGustSpeed < .001 ) { dtWindGustSpeed = 0; }
}
// add leaf fall speed if wind is blowing
if ( (dtWindGustForceReq > 0) || (dtWindGustSpeedReq > 0) ){
dtAddSp = dtAddSp + ( dtblowstr * .1); }
else{
if ( dtAddSp > 0 ){
dtAddSp = dtAddSp - (dtAddSp * .015);
if ( dtAddSp < 1 ) { dtAddSp = 0; }
}
}
//////////////////////////////// loop the entire tree list ////////////////////////////////////
for ( int t = 1; t < dtMasterTreeCount + 1; t++ ){
int opTree = t + dtTreeObjNumStart;
//first we get the distance from the camera and each tree space
if ( lodcheck = 1 ){
dbSetVector3( dtreeVec3, ( tree[t].x - dbCameraPositionX(camobj) ), ( tree[t].y - dbCameraPositionY(camobj) ), ( tree[t].z - dbCameraPositionZ(camobj) ) );
tree[t].dist = dbLengthVector3(dtreeVec3);
}
dist = tree[t].dist;
// Billboarding ( runs independant from the tree main operations )
switch ( tree[t].BBMode ) {
case 0: // BB is off and needs to be switch ON
if ( (dist > dtClipMed) && ( dist < dtClipMax ) ){
tree[t].BBMode=1;
tree[t].BBAlpha=0;
str1 = "bb_";
str2 = tree[t].trunkfilename;
str3 = (char *)malloc((strlen(str1) + strlen(str2) + 1)*sizeof(char));
strcpy(str3, str1); strcat(str3, str2);
aval = tpCACHE_ReturnBillboardMesh( str3 );
dbCloneObject( tree[t].BBObj, aval );
//vertex color
dbConvertObjectFVF( tree[t].BBObj, 338 );
dbLockVertexDataForLimb( tree[t].BBObj,1 );
dbSetVertexDataDiffuse( 0, dbRgb(tree[t].colR1, tree[t].colG1, tree[t].colB1));
dbSetVertexDataDiffuse( 1, dbRgb(tree[t].colR2, tree[t].colG2, tree[t].colB2));
dbSetVertexDataDiffuse( 2, dbRgb(tree[t].colR3, tree[t].colG3, tree[t].colB3));
dbSetVertexDataDiffuse( 3, dbRgb(tree[t].colR3, tree[t].colG3, tree[t].colB3));
dbUnlockVertexData();
dbPositionObject( tree[t].BBObj, tree[t].x, tree[t].y, tree[t].z);
dbSetObjectLight( tree[t].BBObj, dtProngLighting );
dbScaleObject( tree[t].BBObj, tree[t].scale , tree[t].scale + tree[t].AddYScale , tree[t].scale);
dbTextureObject( tree[t].BBObj, tree[t].BillboardTextureRef );
dbSetAlphaMappingOn( tree[t].BBObj, 0 );
dbSetObjectTransparency( tree[t].BBObj, 6);
}
break;
case 1: // rem on and fading IN
if ( tree[t].BBAlpha < dtmaxBillBoardOpaque ){
tree[t].BBAlpha = tree[t].BBAlpha + ( dtFadeInSpeed* 2 );
if ( tree[t].BBAlpha > dtmaxBillBoardOpaque) { tree[t].BBAlpha = dtmaxBillBoardOpaque; }
dbSetAlphaMappingOn( tree[t].BBObj, tree[t].BBAlpha ); }
else{
tree[t].BBMode = 3;
}
break;
case 2: // on and fading out
if ( tree[t].BBAlpha > 0 ){
tree[t].BBAlpha=tree[t].BBAlpha - (dtFadeInSpeed *2 );
if (tree[t].BBAlpha < 0) {tree[t].BBAlpha = 0; }
dbSetAlphaMappingOn( tree[t].BBObj, tree[t].BBAlpha ); }
else{
tree[t].BBMode = 0;
dbDeleteObject( tree[t].BBObj );
}
break;
case 3:
if ( (dist < dtClipMed) || ( dist > dtClipMax ) ){
tree[t].BBMode = 2;
}
break;
}
// billboard rotations
if (tree[t].BBMode != 0){
dbPointObject( tree[t].BBObj, dbCameraPositionX(camobj) ,dbCameraPositionY(camobj) , dbCameraPositionZ(camobj));
// rotations
nlx = ( dbSin(tree[t].WindWave2 + lx + tree[t].WindRand) * (tree[t].WindForce + dtWindGustForce )) /4;
nly= ((dbCos(tree[t].WindWave2 + ly - tree[t].WindRand) * ((tree[t].WindForce + dtWindGustForce)/4))/2)*2;
nlz=((dbCos(tree[t].WindWave2 + lz - tree[t].WindRand) * ((tree[t].WindForce+dtWindGustForce)/4)));
tree[t].WindWave2 = dbWrapValue(tree[t].WindWave2 + (tree[t].WindSpeed * 4 ) + ( dtWindGustSpeed / 4));
dbRotateObject( tree[t].BBObj, dbObjectAngleX(tree[t].BBObj) + ( nlx + dbSin( tree[t].dtWobble )), dbObjectAngleY(tree[t].BBObj) + ( nly + dbSin( tree[t].dtWobble )), dbObjectAngleZ( tree[t].BBObj) + ( nlz + dbSin(tree[t].dtWobble)) );
}
// lets check to see if any trees currently OFF need to be turned ON
// -----------------------------------------------------------------
if (tree[t].status < 1 ){ /// OFF
// if under the Med clip distance Spawn the Full tree
if ( dist < dtClipMed ){
if ( ( dtLoadTreeTimer < dbTimer() ) || ( dtFirstpass <1) ){
aval = tpCACHE_ReturnTrunkMesh( tree[t].trunkfilename ); // gets the treetrunk from the cache holder
dbCloneObject( (t + dtTreeObjNumStart) , aval );
// setup the prongs for this tree
cnt=1;
for ( int r = tree[t].limbObjStart; r != tree[t].limbObjEnd ; ++r){
switch ( tree[t].ProngType ) {
case 0:
dbCloneObject( r, dtProngObjectA );
break;
case 1:
dbCloneObject( r, dtProngObjectB );
break;
case 2:
dbCloneObject( r, dtProngObjectC );
break;
}
dbScaleObject( r, tree[t].prongscale, tree[t].prongscale, tree[t].prongscale);
if ( dtProngLighting <1 ){ dbSetObjectLight( r, 0 ); }
//dbTextureObject( r, (tree[t].ProngTextureRef + tree[t].ProngMipmapSetting) ); ( this currently isnt working, marked out for the time being )
dbTextureObject( r, tree[t].ProngTextureRef );
dbSetObjectTransparency( r, 1 );
dbSetAlphaMappingOn( r, 0 );
// assign wind variables to each prong
dtSwayJointsWindForce[t][cnt]=dtWindForce*(dbRnd(2));
dtSwayJointsWindSpeed[t][cnt]=dtWindSpeed*(dbRnd(2));
dtSwayJointsWindRand[t][cnt]=-90+dbRnd(180);
// misc porperties to set
dbSetObjectCollisionOff( r );
//vertex color
dbConvertObjectFVF( r, 338 );
dbLockVertexDataForLimb( r,1 );
switch ( tree[t].ProngType ) {
case 0:
dbSetVertexDataDiffuse( 0, dbRgb(tree[t].colR1, tree[t].colG1, tree[t].colB1));
dbSetVertexDataDiffuse( 1, dbRgb(tree[t].colR2, tree[t].colG2, tree[t].colB2));
dbSetVertexDataDiffuse( 2, dbRgb(tree[t].colR3, tree[t].colG3, tree[t].colB3));
dbSetVertexDataDiffuse( 3, dbRgb(tree[t].colR3, tree[t].colG3, tree[t].colB3));
break;
case 2:
dbSetVertexDataDiffuse( 0, dbRgb(tree[t].colR1, tree[t].colG1, tree[t].colB1));
dbSetVertexDataDiffuse( 1, dbRgb(tree[t].colR1, tree[t].colG1, tree[t].colB1));
dbSetVertexDataDiffuse( 2, dbRgb(tree[t].colR2, tree[t].colG2, tree[t].colB2));
dbSetVertexDataDiffuse( 3, dbRgb(tree[t].colR2, tree[t].colG2, tree[t].colB2));
dbSetVertexDataDiffuse( 4, dbRgb(tree[t].colR2, tree[t].colG2, tree[t].colB2));
dbSetVertexDataDiffuse( 5, dbRgb(tree[t].colR2, tree[t].colG2, tree[t].colB2));
dbSetVertexDataDiffuse( 6, dbRgb(tree[t].colR3, tree[t].colG3, tree[t].colB3));
dbSetVertexDataDiffuse( 7, dbRgb(tree[t].colR3, tree[t].colG3, tree[t].colB3));
dbSetVertexDataDiffuse( 8, dbRgb(tree[t].colR3, tree[t].colG3, tree[t].colB3));
break;
}
dbUnlockVertexData();
}
// position intial trees settings
dbScaleObject( t + dtTreeObjNumStart, tree[t].scale, tree[t].scale + tree[t].AddYScale, tree[t].scale );
dbPositionObject( t + dtTreeObjNumStart, tree[t].x, tree[t].y, tree[t].z );
dbRotateObject( t + dtTreeObjNumStart, tree[t].xr, tree[t].yr, tree[t].zr );
dbTextureObject( t + dtTreeObjNumStart, tree[t].trunkTextureRef );
dbSetObjectTransparency( t + dtTreeObjNumStart, 6 );
dbSetAlphaMappingOn( t + dtTreeObjNumStart, 0 );
tree[t].TreeAlpha = 0;
tree[t].status = 1;
dtLoadTreeTimer = dbTimer() + dtTreeLoadTime;
}
}
}
// tick processing
if ( dist < (dtClipMed / 2) ){
tree[t].tick = 0; }
else{
if (tree[t].tick < 1) { tree[t].tick = dtTickProcessing; }
tree[t].tick = tree[t].tick - 1;
}
/// Inview range check ////
if (tree[t].status > 0 ){
if ( dbObjectInScreen( t+dtTreeObjNumStart ) ){
inview = 1;
totinview++;
// Trees that are at full detial need updating
// --------------------------------------------
if ( (tree[t].status > 0) && (tree[t].tick < 1)) {
//rem trunk alpha
if ( (tree[t].TreeAlpha < 101) && ( dist < dtClipMed )){
tree[t].TreeAlpha = tree[t].TreeAlpha + dtFadeInSpeed;
dbSetAlphaMappingOn( t + dtTreeObjNumStart , tree[t].TreeAlpha *2 );
if ( tree[t].TreeAlpha > 99 ) { dbSetObjectTransparency( t + dtTreeObjNumStart, 0); }
}
if ( (tree[t].TreeAlpha > 0) && ( dist > dtClipMed )){
tree[t].TreeAlpha=tree[t].TreeAlpha - dtFadeInSpeed;
dbSetAlphaMappingOn( t + dtTreeObjNumStart, tree[t].TreeAlpha);
}
// Rustling 3d sound
if ( dtRustlingSoundFile > 0 ){
if ( dtSoundRustleTimer < dbTimer()) {
if ( dbRnd(2000) == dbRnd(2000) ){
dbPositionSound( dtRustlingSoundFile, tree[t].x, tree[t].y, tree[t].z );
dbPlaySound( dtRustlingSoundFile );
dtSoundRustleTimer = dbTimer()+15000;
}
}
}
//rem add wind motion to the sway points
for ( int r = 1; r < tree[t].SwayPivAmt +1; r++ ){
lx=dbLimbAngleX(opTree, dtSwayJoints[t][r] );
lz=dbLimbAngleZ(opTree, dtSwayJoints[t][r] );
ly=dbLimbAngleY(opTree, dtSwayJoints[t][r] );
nlx=(dbSin(tree[t].WindWave+lx+tree[t].WindRand)*(tree[t].WindForce+dtWindGustForce))/4;
nly=(dbCos(tree[t].WindWave + ly - tree[t].WindRand) * ((tree[t].WindForce+dtWindGustForce)/2))/2;
nlz=(dbCos(tree[t].WindWave + lz - tree[t].WindRand) * ((tree[t].WindForce+dtWindGustForce)/2))/4;
dbRotateLimb( opTree, dtSwayJoints[t][r], nlx+dbSin(tree[t].dtWobble), nly+dbSin(tree[t].dtWobble), nlz+dbSin(tree[t].dtWobble));
}
tree[t].WindWave= dbWrapValue(tree[t].WindWave + (tree[t].WindSpeed)+(dtWindGustSpeed/2));
//rem update the prongs to their proper locations
cnt=1;
for ( int r = tree[t].limbObjStart; r != tree[t].limbObjEnd ; ++r){
dbPositionObject( r, dbLimbPositionX(opTree, dtProngJoints[t][cnt]), dbLimbPositionY(opTree, dtProngJoints[t][cnt]), dbLimbPositionZ(opTree, dtProngJoints[t][cnt]));
dbPointObject( r, dbCameraPositionX(camobj) ,dbCameraPositionY(camobj) , dbCameraPositionZ(camobj) );
dbRotateObject( r, dbObjectAngleX(r), dbCameraAngleY(camobj)-180 , dbCos(dbObjectAngleZ(r)*.2));
dbSetAlphaMappingOn( r, tree[t].TreeAlpha);
if ( tree[t].TreeAlpha < 85 ){ dbSetObjectTransparency( r, 2 ); } else { dbSetObjectTransparency( r, 2 ); }
cnt++;
}
}
// ---- if not in view
if ( tree[t].Inview < 1 ){
dbShowObject( t + dtTreeObjNumStart );
for ( int r = tree[t].limbObjStart; r != tree[t].limbObjEnd ; ++r){
dbExcludeObjectOff( r );
}
tree[t].Inview = 1;
}
else
{
inview = 0;
if ( tree[t].Inview < 1 ) {
tree[t].Inview = 1;
dbHideObject( t + dtTreeObjNumStart );
for ( int r = tree[t].limbObjStart; r != tree[t].limbObjEnd ; ++r){
dbExcludeObjectOn( r );
}
}
}
// if it's past the clip - just remove it
if ( dist > dtClipMed ) {
tree[t].status = 0;
//delete the trunk
dbDeleteObject( t + dtTreeObjNumStart );
//delete prongs
for ( int r = tree[t].limbObjStart; r != tree[t].limbObjEnd ; ++r){
dbDeleteObject( r );
}
goto StopSpud;
}
}
}
//montior falling leaves ----------------------------------------------
if (tree[t].FLRef > 0 ){
if (tree[t].tplstate == 1){
if (tree[t].tplAlpha < 100 ){
tree[t].tplAlpha = tree[t].tplAlpha + 5;
dbSetAlphaMappingOn( tree[t].FLRef, tree[t].tplAlpha );
}
}
//check state change for the leaf
if ( dbObjectPositionY(tree[t].FLRef ) < ( tree[t].tplMiny + tree[t].tplMiny / 2 ) ){
tree[t].tplstate=2;
}
dbPointObject( tree[t].FLRef, dbCameraPositionX(camobj) ,dbCameraPositionY(camobj), dbCameraPositionZ(camobj) );
dbRotateObject( tree[t].FLRef, dbObjectAngleX( tree[t].FLRef), dbCameraAngleY(camobj)-180 , dbWrapValue(tree[t].tplzr));
tree[t].tplzr=tree[t].tplzr + tprandFloat(.4, .8);
tree[t].tplvx = tree[t].tplvx + tprandFloat(-0.002, .002);
if ( dtAddSp > 0 ){
if (tree[t].tplvx > 0){ tree[t].tplvx = tree[t].tplvx + (dtAddSp *.0003); }
if (tree[t].tplvx < 0){ tree[t].tplvx = tree[t].tplvx - (dtAddSp *.0003); }
if (tree[t].tplvx > 5){ tree[t].tplvx = .0012; }
if (tree[t].tplvx < -5){ tree[t].tplvx = -.0012; }
}
tree[t].tplvz = tree[t].tplvz + tprandFloat (-0.002, .002);
if ( dtAddSp > 0 ){
if (tree[t].tplvz > 0){ tree[t].tplvz=tree[t].tplvz+(dtAddSp*.0003); }
if (tree[t].tplvz < 0){ tree[t].tplvz=tree[t].tplvz-(dtAddSp*.0003); }
if (tree[t].tplvz > 5){ tree[t].tplvz = .0012;}
if (tree[t].tplvz <-5){ tree[t].tplvz = -.0012;}
}
dbPositionObject( tree[t].FLRef, tree[t].tplx, tree[t].tply, tree[t].tplz);
tree[t].tplx = (dbObjectPositionX( tree[t].FLRef) + tree[t].tplvx);
tree[t].tply = (dbObjectPositionY( tree[t].FLRef) - dtLeafDropSpeed);
tree[t].tplz = (dbObjectPositionZ( tree[t].FLRef) + tree[t].tplvz);
//remove the leaf if tree is past the med clip range
if ( dist > dtClipMed ) {
if ( tree[t].FLRef > 0 ){
dbDeleteObject(tree[t].FLRef);
tree[t].FLRef = 0;
tree[t].tplstate = 0;
}
}
// fade out leaf then dissolve object
if (tree[t].tplstate == 2){
if (tree[t].tplAlpha > 0){
tree[t].tplAlpha = tree[t].tplAlpha - 5;
dbSetAlphaMappingOn( tree[t].FLRef, tree[t].tplAlpha );}
else{
dbDeleteObject( tree[t].FLRef);
tree[t].FLRef = 0;
}
}
}
// LAST THING TO CHECK
// does this tree need removed from the live queue?
if ( dist > dtClipMed + 1 ){
//remove falling leaves from this tree
if ( tree[t].FLRef > 0 ){
dbDeleteObject( tree[t].FLRef );
tree[t].FLRef = 0;
}
tree[t].status = 0;
//delete the trunk
dbDeleteObject( t+dtTreeObjNumStart );
//delete prongs
for ( int r = tree[t].limbObjStart; r != tree[t].limbObjEnd ; ++r){
dbDeleteObject( r );
}
}
StopSpud:;
dtFirstpass=1;
} //// for next end///////////////////////////////////////////////////////////////////////////////////////////
} //end Update
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