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uvis.cpp
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C/C++ Source or Header
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1997-07-14
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14KB
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539 lines
/*==========================================================================
*
* Copyright (C) 1995, 1996 Microsoft Corporation. All Rights Reserved.
*
* File: uvis.cpp
*
***************************************************************************/
#include <math.h>
#include <stdlib.h>
#include <d3d.h>
#include "d3dmacs.h"
#include "rmdemo.h"
typedef struct _Flame {
int valid;
D3DVECTOR velocity; /* direction the flame is going */
D3DVECTOR orientation; /* random vector normal to velocity */
D3DVECTOR position; /* current position */
int time; /* current time */
int lifetime; /* time to die */
} Flame;
/*
* A flame is a diamond shape oriented along its direction vector.
* This updates the four vertices of the flame, given its current time.
*/
void UpdateFlame(Flame* flame, D3DVERTEX v[])
{
D3DVECTOR dir = flame->velocity;
D3DVECTOR off = flame->orientation;
D3DVECTOR norm;
D3DVECTOR start, end, left, right;
double size;
int i;
D3DRMVectorNormalise(&dir);
/*
* Calculate a normal vector to the flame
*/
D3DRMVectorCrossProduct(&norm, &dir, &off);
D3DRMVectorNormalise(&norm);
/*
* The size starts off small, gets bigger towards the middle
* and smaller towards the end.
*/
if (flame->time < flame->lifetime / 2)
size = (double) flame->time / (double)(flame->lifetime / 2);
else
size = ((double) (flame->lifetime - flame->time)
/ (double)(flame->lifetime / 2));
/*
* Calculate the four corners of the diamond.
*/
D3DRMVectorScale(&dir, &dir, D3DVAL(size));
D3DRMVectorScale(&off, &off, D3DVAL(size / 4));
start = flame->position;
D3DRMVectorAdd(&end, &start, &dir);
D3DRMVectorScale(&dir, &dir, D3DVAL(0.5));
D3DRMVectorAdd(&left, &start, &dir);
right = left;
D3DRMVectorAdd(&left, &left, &off);
D3DRMVectorSubtract(&right, &right, &off);
/*
* Update the flame's position.
*/
D3DRMVectorAdd(&flame->position, &flame->position, &flame->velocity);
flame->time++;
if (flame->time == flame->lifetime)
flame->valid = 0;
/*
* And fill in the vertices. There are eight, four for each side of
* the flame.
*/
i = 0;
v[i].x = start.x; v[i].y = start.y; v[i].z = start.z;
v[i].nx = -norm.x; v[i].ny = -norm.y; v[i].nz = -norm.z;
v[i].tu = D3DVAL(0); v[i].tv = D3DVAL(0);
i++;
v[i].x = left.x; v[i].y = left.y; v[i].z = left.z;
v[i].nx = -norm.x; v[i].ny = -norm.y; v[i].nz = -norm.z;
v[i].tu = D3DVAL(1); v[i].tv = D3DVAL(0);
i++;
v[i].x = end.x; v[i].y = end.y; v[i].z = end.z;
v[i].nx = -norm.x; v[i].ny = -norm.y; v[i].nz = -norm.z;
v[i].tu = D3DVAL(1); v[i].tv = D3DVAL(1);
i++;
v[i].x = right.x; v[i].y = right.y; v[i].z = right.z;
v[i].nx = -norm.x; v[i].ny = -norm.y; v[i].nz = -norm.z;
v[i].tu = D3DVAL(0); v[i].tv = D3DVAL(1);
i++;
v[i].x = start.x; v[i].y = start.y; v[i].z = start.z;
v[i].nx = norm.x; v[i].ny = norm.y; v[i].nz = norm.z;
v[i].tu = D3DVAL(0); v[i].tv = D3DVAL(0);
i++;
v[i].x = right.x; v[i].y = right.y; v[i].z = right.z;
v[i].nx = norm.x; v[i].ny = norm.y; v[i].nz = norm.z;
v[i].tu = D3DVAL(0); v[i].tv = D3DVAL(1);
i++;
v[i].x = end.x; v[i].y = end.y; v[i].z = end.z;
v[i].nx = norm.x; v[i].ny = norm.y; v[i].nz = norm.z;
v[i].tu = D3DVAL(1); v[i].tv = D3DVAL(1);
i++;
v[i].x = left.x; v[i].y = left.y; v[i].z = left.z;
v[i].nx = norm.x; v[i].ny = norm.y; v[i].nz = norm.z;
v[i].tu = D3DVAL(1); v[i].tv = D3DVAL(0);
i++;
}
void InitFlame(Flame* flame)
{
D3DVECTOR d, u;
flame->valid = TRUE;
do {
D3DRMVectorRandom(&d);
d.y = d.y * d.y;
d.y = d.y * d.y;
} while (d.y < D3DVAL(0.3));
/*
* Pick a vector normal to d
*/
if (d.y != D3DVAL(0.0) || d.z != D3DVAL(0.0))
{
u.x = D3DVAL(0.0);
if (d.y == D3DVAL(0.0))
{
u.y = D3DVAL(1.0);
u.z = D3DVAL(0.0);
} else {
D3DVALUE n_fix =
D3DVAL(1.0)
+ D3DDivide(D3DMultiply(d.z, d.z), D3DMultiply(d.y, d.y));
u.z = D3DVAL(sqrt(D3DDivide(D3DVAL(1.0), D3DVAL(n_fix))));
u.y = -D3DMultiply(u.z, D3DDivide(d.z, d.y));
}
} else {
u.x = D3DVAL(0.0);
u.y = D3DVAL(0.0);
u.z = D3DVAL(1.0);
}
/*
* Randomize it.
*/
D3DRMVectorRotate(&u, &u, &d, D3DDivide(D3DVAL(6.28 * (rand() % 100)),
D3DVAL(100.0)));
D3DRMVectorScale(&d, &d, D3DVAL(0.1));
flame->velocity = d;
flame->orientation = u;
flame->position.x = D3DVAL(0);
flame->position.y = D3DVAL(0);
flame->position.z = D3DVAL(0);
flame->time = 0;
do {
flame->lifetime = rand() % 30;
} while (flame->lifetime < 5);
}
#define MAX_FLAMES 100
typedef struct _Fire {
Flame flames[MAX_FLAMES];
LPDIRECT3DRMDEVICE dev;
LPDIRECT3DEXECUTEBUFFER eb;
LPDIRECT3DMATERIAL mat;
} Fire;
void CDECL CleanupFireObjects(LPDIRECT3DRMOBJECT dev, void* arg)
{
Fire* fire = (Fire*) arg;
if (fire->eb) {
fire->eb->Release();
fire->mat->Release();
fire->eb = NULL;
fire->dev = NULL;
}
}
typedef struct _FireExecuteBuffer {
D3DVERTEX v[8 * MAX_FLAMES];
D3DINSTRUCTION op_state_light1;
D3DSTATE state1;
D3DINSTRUCTION op_set_status;
D3DSTATUS setstatus1;
D3DINSTRUCTION op_process_vertices1;
D3DPROCESSVERTICES processvertices1;
D3DINSTRUCTION op_state_render;
D3DSTATE state2;
D3DSTATE state3;
D3DSTATE state4;
D3DINSTRUCTION op_triangle_list;
D3DTRIANGLE tri[4 * MAX_FLAMES];
D3DINSTRUCTION exit1;
} FireExecuteBuffer;
BOOL CreateFireObjects(Fire* fire, LPDIRECT3DRMDEVICE dev)
{
D3DEXECUTEBUFFERDESC desc;
D3DEXECUTEDATA data;
LPDIRECT3D lpD3D = NULL;
LPDIRECT3DDEVICE lpD3DDev = NULL;
LPDIRECT3DMATERIAL mat = NULL;
LPDIRECT3DEXECUTEBUFFER eb = NULL;
D3DMATERIALHANDLE hMat;
D3DMATERIAL orange;
void* p;
int i;
RELEASE(fire->eb);
dev->GetDirect3DDevice(&lpD3DDev);
if (!lpD3DDev)
goto generic_error;
if (FAILED(lpD3DDev->GetDirect3D(&lpD3D)))
goto generic_error;
desc.dwSize = sizeof(desc);
desc.dwFlags = D3DDEB_BUFSIZE;
desc.dwBufferSize = sizeof(FireExecuteBuffer);
if (FAILED(lpD3DDev->CreateExecuteBuffer(&desc, &eb, NULL)))
goto generic_error;
if (FAILED(lpD3D->CreateMaterial(&mat, NULL)))
goto generic_error;
if (FAILED(mat->GetHandle(lpD3DDev, &hMat)))
goto generic_error;
memset(&orange, 0, sizeof(orange));
orange.dwSize = sizeof(orange);
orange.diffuse.r = D3DVAL(1.0);
orange.diffuse.g = D3DVAL(0.5);
orange.diffuse.b = D3DVAL(0.0);
orange.ambient.r = D3DVAL(1.0);
orange.ambient.g = D3DVAL(0.5);
orange.ambient.b = D3DVAL(0.0);
orange.dwRampSize = 32;
if (FAILED(mat->SetMaterial(&orange)))
goto generic_error;
if (FAILED(eb->Lock(&desc)))
goto generic_error;
p = (void*) ((char*) desc.lpData + 8 * MAX_FLAMES * sizeof(D3DVERTEX));
OP_STATE_LIGHT(1, p);
STATE_DATA(D3DLIGHTSTATE_MATERIAL, hMat, p);
OP_SET_STATUS(D3DSETSTATUS_ALL, D3DSTATUS_DEFAULT, 2048, 2048, 0, 0, p);
OP_PROCESS_VERTICES(1, p);
PROCESSVERTICES_DATA(D3DPROCESSVERTICES_TRANSFORMLIGHT,
0, 8 * MAX_FLAMES, p);
OP_STATE_RENDER(3, p);
STATE_DATA(D3DRENDERSTATE_SHADEMODE, D3DSHADE_FLAT, p);
STATE_DATA(D3DRENDERSTATE_TEXTUREHANDLE, 0, p);
STATE_DATA(D3DRENDERSTATE_BLENDENABLE, FALSE, p);
OP_TRIANGLE_LIST(4 * MAX_FLAMES, p);
for (i = 0; i < MAX_FLAMES; i++) {
D3DTRIANGLE* t;
int base;
t = (D3DTRIANGLE*) p;
base = 4 * i;
t->v1 = base + 0;
t->v2 = base + 1;
t->v3 = base + 3;
t->wFlags = D3DTRIFLAG_EDGEENABLETRIANGLE;
t++;
t->v1 = base + 1;
t->v2 = base + 2;
t->v3 = base + 3;
t->wFlags = D3DTRIFLAG_EDGEENABLETRIANGLE;
t++;
t->v1 = base + 0;
t->v2 = base + 1;
t->v3 = base + 3;
t->wFlags = D3DTRIFLAG_EDGEENABLETRIANGLE;
t++;
t->v1 = base + 1;
t->v2 = base + 2;
t->v3 = base + 3;
t->wFlags = D3DTRIFLAG_EDGEENABLETRIANGLE;
t++;
p = (char*) t;
}
OP_EXIT(p);
if (FAILED(eb->Unlock()))
goto generic_error;
data.dwSize = sizeof(data);
data.dwVertexOffset = 0;
data.dwVertexCount = 8 * MAX_FLAMES;
data.dwInstructionOffset = 8 * MAX_FLAMES * sizeof(D3DVERTEX);
data.dwInstructionLength = sizeof(FireExecuteBuffer) - data.dwInstructionOffset;
data.dwHVertexOffset = 0;
if (FAILED(eb->SetExecuteData(&data)))
goto generic_error;
fire->eb = eb;
fire->mat = mat;
fire->dev = dev;
if (FAILED(dev->AddDestroyCallback(CleanupFireObjects, fire)))
goto generic_error;
RELEASE(lpD3DDev);
RELEASE(lpD3D);
return TRUE;
generic_error:
RELEASE(lpD3D);
RELEASE(lpD3DDev);
RELEASE(mat);
RELEASE(eb);
return FALSE;
}
BOOL RenderFire(Fire* fire, LPDIRECT3DRMDEVICE dev, LPDIRECT3DRMVIEWPORT view)
{
D3DVERTEX* v;
D3DEXECUTEBUFFERDESC desc;
D3DEXECUTEDATA data;
LPDIRECT3DDEVICE lpD3DDev = NULL;
LPDIRECT3DVIEWPORT lpD3DView = NULL;
int i;
if (fire->dev != dev) {
if (!CreateFireObjects(fire, dev))
return FALSE;
}
dev->GetDirect3DDevice(&lpD3DDev);
view->GetDirect3DViewport(&lpD3DView);
if (!lpD3DDev || !lpD3DView)
goto ret_with_error;
for (i = 0; i < MAX_FLAMES; i++)
if (!fire->flames[i].valid)
InitFlame(&fire->flames[i]);
desc.dwSize = sizeof(desc);
desc.dwFlags = 0;
if (FAILED(fire->eb->Lock(&desc)))
goto ret_with_error;
v = (D3DVERTEX*) desc.lpData;
for (i = 0; i < MAX_FLAMES; i++)
UpdateFlame(&fire->flames[i], &v[8 * i]);
if (FAILED(fire->eb->Unlock()))
goto ret_with_error;
if (FAILED(lpD3DDev->Execute(fire->eb, lpD3DView, D3DEXECUTE_CLIPPED)))
goto ret_with_error;
data.dwSize = sizeof data;
if (FAILED(fire->eb->GetExecuteData(&data)))
goto ret_with_error;
if (FAILED(view->ForceUpdate(data.dsStatus.drExtent.x1,
data.dsStatus.drExtent.y1,
data.dsStatus.drExtent.x2,
data.dsStatus.drExtent.y2)))
goto ret_with_error;
RELEASE(lpD3DDev);
RELEASE(lpD3DView);
return TRUE;
ret_with_error:
RELEASE(lpD3DDev);
RELEASE(lpD3DView);
return FALSE;
}
int CDECL FireCallback(LPDIRECT3DRMUSERVISUAL uvis,
void* arg,
D3DRMUSERVISUALREASON reason,
LPDIRECT3DRMDEVICE dev,
LPDIRECT3DRMVIEWPORT view)
{
Fire* fire = (Fire*) arg;
if (reason == D3DRMUSERVISUAL_CANSEE)
return TRUE;
if (reason == D3DRMUSERVISUAL_RENDER) {
if (!RenderFire(fire, dev, view))
return DDERR_GENERIC;
else
return D3D_OK;
}
return 0;
}
void CDECL DestroyFire(LPDIRECT3DRMOBJECT obj, void* arg)
{
Fire* fire = (Fire*) arg;
if (fire->dev)
fire->dev->DeleteDestroyCallback(CleanupFireObjects, arg);
CleanupFireObjects((LPDIRECT3DRMOBJECT)fire->dev, (void*) fire);
free(fire);
}
LPDIRECT3DRMUSERVISUAL CreateFire()
{
Fire* fire;
LPDIRECT3DRMUSERVISUAL uvis = NULL;
fire = (Fire*)malloc(sizeof(Fire));
if (!fire)
goto ret_with_error;
memset(fire, 0, sizeof(Fire));
if (FAILED(lpD3DRM->CreateUserVisual(FireCallback, (void*) fire, &uvis)))
goto ret_with_error;
if (FAILED(uvis->AddDestroyCallback(DestroyFire, (void*) fire)))
goto ret_with_error;
return uvis;
ret_with_error:
if (fire)
free(fire);
RELEASE(uvis);
return NULL;
}
BOOL
BuildScene(LPDIRECT3DRMDEVICE dev, LPDIRECT3DRMVIEWPORT view,
LPDIRECT3DRMFRAME scene, LPDIRECT3DRMFRAME camera)
{
D3DRMRENDERQUALITY quality = D3DRMRENDER_GOURAUD;
LPDIRECT3DRMFRAME lights = NULL;
LPDIRECT3DRMFRAME frame = NULL;
LPDIRECT3DRMLIGHT light1 = NULL;
LPDIRECT3DRMLIGHT light2 = NULL;
LPDIRECT3DRMUSERVISUAL uvis = NULL;
view = view; /* not used */
if (FAILED(dev->SetQuality(quality)))
goto generic_error;
/*
* initialize the lights in the scene
*/
if (FAILED(lpD3DRM->CreateFrame(scene, &lights)))
goto generic_error;
if (FAILED(lights->SetPosition(scene, D3DVAL(5), D3DVAL(5), -D3DVAL(1))))
goto generic_error;
if(FAILED(lights->SetOrientation(scene, D3DVAL(0), D3DVAL(0), D3DVAL(1),
D3DVAL(0), D3DVAL(1), D3DVAL(1))))
goto generic_error;
if(FAILED(lpD3DRM->CreateLightRGB(D3DRMLIGHT_DIRECTIONAL, D3DVAL(0.9),
D3DVAL(0.8), D3DVAL(0.7), &light1)))
goto generic_error;
if (FAILED(lights->AddLight(light1)))
goto generic_error;
if(FAILED(lpD3DRM->CreateLightRGB(D3DRMLIGHT_AMBIENT, D3DVAL(0.1),
D3DVAL(0.1), D3DVAL(0.1), &light2)))
goto generic_error;
if (FAILED(scene->AddLight(light2)))
goto generic_error;
/*
* create a frame within the scene
*/
if (FAILED(lpD3DRM->CreateFrame(scene, &frame)))
goto generic_error;
/*
* add the fire into the frame
*/
uvis = CreateFire();
if (!uvis)
goto generic_error;
if (FAILED(frame->AddVisual(uvis)))
goto generic_error;
/*
* set up the frames position, orientation and rotation
*/
if (FAILED(camera->SetPosition(scene, D3DVAL(0), D3DVAL(0.5), -D3DVAL(10))))
goto generic_error;
if(FAILED(camera->SetOrientation(scene, D3DVAL(0), D3DVAL(0), D3DVAL(1), D3DVAL(0),
D3DVAL(1), D3DVAL(0))))
goto generic_error;
if(FAILED(frame->SetRotation(scene, D3DVAL(0), D3DVAL(1), D3DVAL(0),
D3DVAL(0.02))))
goto generic_error;
RELEASE(uvis);
RELEASE(frame);
RELEASE(lights);
RELEASE(light1);
RELEASE(light2);
return TRUE;
generic_error:
Msg("A failure occurred while building the scene.\n");
RELEASE(lights);
RELEASE(frame);
RELEASE(light1);
RELEASE(light2);
RELEASE(uvis);
return FALSE;
}
void
OverrideDefaults(Defaults *defaults)
{
defaults->bConstRenderQuality = TRUE;
defaults->bNoTextures = TRUE;
lstrcpy(defaults->Name, "User Visual Direct3DRM Example");
}