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- FEATURE : Add improved OpenGL sample sent by Brad Grantham, many thanks for your work! 

- BUGFIX  : Fix the library input path for AssImp-library.

git-svn-id: https://assimp.svn.sourceforge.net/svnroot/assimp/trunk@498 67173fc5-114c-0410-ac8e-9d2fd5bffc1f
pull/1/head
kimmi 2009-10-24 11:10:42 +00:00
parent 4639ef0d1b
commit 14283aa036
2 changed files with 175 additions and 30 deletions
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203
samples/SimpleOpenGL/Sample_SimpleOpenGL.c
View File

@ -1,6 +1,5 @@
// ----------------------------------------------------------------------------
// Simple sample to prove that Assimp is absolutely easy to use with OpenGL.
// Simple sample to prove that Assimp is easy to use with OpenGL.
// It takes a file name as command line parameter, loads it using standard
// settings and displays it.
//
@ -20,7 +19,8 @@
// the global Assimp scene object
const struct aiScene* scene = NULL;
struct aiVector3D scene_min,scene_max;
GLuint scene_list = 0;
struct aiVector3D scene_min, scene_max, scene_center;
// current rotation angle
static float angle = 0.f;
@ -49,6 +49,7 @@ void get_bounding_box_for_node (const struct aiNode* nd,
struct aiMatrix4x4 prev;
unsigned int n = 0, t;
prev = *trafo;
aiMultiplyMatrix4(trafo,&nd->mTransformation);
for (; n < nd->mNumMeshes; ++n) {
@ -68,7 +69,6 @@ void get_bounding_box_for_node (const struct aiNode* nd,
}
}
prev = nd->mTransformation;
for (n = 0; n < nd->mNumChildren; ++n) {
get_bounding_box_for_node(nd->mChildren[n],min,max,trafo);
}
@ -87,37 +87,156 @@ void get_bounding_box (struct aiVector3D* min, struct aiVector3D* max)
}
// ----------------------------------------------------------------------------
void recursive_render (const struct aiNode* nd)
void color4_to_float4(const struct aiColor4D *c, float f[4])
{
f[0] = c->r;
f[1] = c->g;
f[2] = c->b;
f[3] = c->a;
}
void set_float4(float f[4], float a, float b, float c, float d)
{
f[0] = a;
f[1] = b;
f[2] = c;
f[3] = d;
}
// ----------------------------------------------------------------------------
void apply_material(const struct aiMaterial *mtl)
{
float c[4];
GLenum fill_mode;
int ret1, ret2;
struct aiColor4D diffuse;
struct aiColor4D specular;
struct aiColor4D ambient;
struct aiColor4D emission;
float shininess, strength;
int two_sided;
int wireframe;
int max;
set_float4(c, 0.8f, 0.8f, 0.8f, 1.0f);
if(AI_SUCCESS == aiGetMaterialColor(mtl, AI_MATKEY_COLOR_DIFFUSE, &diffuse))
color4_to_float4(&diffuse, c);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, c);
set_float4(c, 0.0f, 0.0f, 0.0f, 1.0f);
if(AI_SUCCESS == aiGetMaterialColor(mtl, AI_MATKEY_COLOR_SPECULAR, &specular))
color4_to_float4(&specular, c);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, c);
set_float4(c, 0.2f, 0.2f, 0.2f, 1.0f);
if(AI_SUCCESS == aiGetMaterialColor(mtl, AI_MATKEY_COLOR_AMBIENT, &ambient))
color4_to_float4(&ambient, c);
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, c);
set_float4(c, 0.0f, 0.0f, 0.0f, 1.0f);
if(AI_SUCCESS == aiGetMaterialColor(mtl, AI_MATKEY_COLOR_EMISSIVE, &emission))
color4_to_float4(&emission, c);
glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, c);
max = 1;
ret1 = aiGetMaterialFloatArray(mtl, AI_MATKEY_SHININESS, &shininess, &max);
max = 1;
ret2 = aiGetMaterialFloatArray(mtl, AI_MATKEY_SHININESS_STRENGTH, &strength, &max);
if((ret1 == AI_SUCCESS) && (ret2 == AI_SUCCESS))
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, shininess * strength);
else {
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 0.0f);
set_float4(c, 0.0f, 0.0f, 0.0f, 0.0f);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, c);
}
max = 1;
if(AI_SUCCESS == aiGetMaterialIntegerArray(mtl, AI_MATKEY_ENABLE_WIREFRAME, &wireframe, &max))
fill_mode = wireframe ? GL_LINE : GL_FILL;
else
fill_mode = GL_FILL;
glPolygonMode(GL_FRONT_AND_BACK, fill_mode);
max = 1;
if((AI_SUCCESS == aiGetMaterialIntegerArray(mtl, AI_MATKEY_TWOSIDED, &two_sided, &max)) && two_sided)
glEnable(GL_CULL_FACE);
else
glDisable(GL_CULL_FACE);
}
// ----------------------------------------------------------------------------
// Can't send color down as a pointer to aiColor4D because AI colors are ABGR.
void Color4f(const struct aiColor4D *color)
{
glColor4f(color->r, color->g, color->b, color->a);
}
// ----------------------------------------------------------------------------
void recursive_render (const struct aiScene *sc, const struct aiNode* nd)
{
int i;
unsigned int n = 0, t;
struct aiMatrix4x4 m = nd->mTransformation;
// update transform
aiTransposeMatrix4(&m);
glPushMatrix();
glMultMatrixf((float*)&m);
// draw all meshes assigned to this node
for (; n < nd->mNumMeshes; ++n) {
const struct aiMesh* mesh = scene->mMeshes[nd->mMeshes[n]];
glBegin(GL_TRIANGLES);
apply_material(sc->mMaterials[mesh->mMaterialIndex]);
if(mesh->mNormals == NULL) {
glDisable(GL_LIGHTING);
} else {
glEnable(GL_LIGHTING);
}
if(mesh->mColors[0] != NULL) {
glEnable(GL_COLOR_MATERIAL);
} else {
glDisable(GL_COLOR_MATERIAL);
}
for (t = 0; t < mesh->mNumFaces; ++t) {
const struct aiFace* face = &mesh->mFaces[t];
GLenum face_mode;
glColor3f(1.f,0.f,0.f);
glVertex3fv(&mesh->mVertices[face->mIndices[0]].x);
glVertex3fv(&mesh->mVertices[face->mIndices[1]].x);
glVertex3fv(&mesh->mVertices[face->mIndices[2]].x);
switch(face->mNumIndices) {
case 1: face_mode = GL_POINTS; break;
case 2: face_mode = GL_LINES; break;
case 3: face_mode = GL_TRIANGLES; break;
default: face_mode = GL_POLYGON; break;
}
glBegin(face_mode);
for(i = 0; i < face->mNumIndices; i++) {
int index = face->mIndices[i];
if(mesh->mColors[0] != NULL)
Color4f(&mesh->mColors[0][index]);
if(mesh->mNormals != NULL)
glNormal3fv(&mesh->mNormals[index].x);
glVertex3fv(&mesh->mVertices[index].x);
}
glEnd();
}
glEnd();
}
// draw all children
for (n = 0; n < nd->mNumChildren; ++n) {
recursive_render(nd->mChildren[n]);
recursive_render(sc, nd->mChildren[n]);
}
glPopMatrix();
}
// ----------------------------------------------------------------------------
@ -136,29 +255,40 @@ void do_motion (void)
void display(void)
{
float tmp;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(0.f,0.f,3.f,0.f,0.f,-5.f,0.f,1.f,0.f);
// scale the whole asset to fit into our view frustum
tmp = scene_max.x-scene_min.x;
tmp = aisgl_max(scene_max.y-scene_min.y,tmp);
tmp = aisgl_max(scene_max.z-scene_min.z,tmp);
tmp = 1.f/(tmp);
glScalef(tmp,tmp,tmp);
// fixme: center around origin
// rotate it around the y axis
glRotatef(angle,0.f,1.f,0.f);
// now begin at the root node of the imported data and traverse
// the scenegraph by multipliying subsequent local transforms
// together on GL's matrix stack.
recursive_render(scene->mRootNode);
// scale the whole asset to fit into our view frustum
tmp = scene_max.x-scene_min.x;
tmp = aisgl_max(scene_max.y - scene_min.y,tmp);
tmp = aisgl_max(scene_max.z - scene_min.z,tmp);
tmp = 1.f / tmp;
glScalef(tmp, tmp, tmp);
// center the model
glTranslatef( -scene_center.x, -scene_center.y, -scene_center.z );
// if the display list has not been made yet, create a new one and
// fill it with scene contents
if(scene_list == 0) {
scene_list = glGenLists(1);
glNewList(scene_list, GL_COMPILE);
// now begin at the root node of the imported data and traverse
// the scenegraph by multiplying subsequent local transforms
// together on GL's matrix stack.
recursive_render(scene, scene->mRootNode);
glEndList();
}
glCallList(scene_list);
glutSwapBuffers();
do_motion();
@ -172,8 +302,10 @@ int loadasset (const char* path)
scene = aiImportFile(path,aiProcessPreset_TargetRealtime_Quality);
if (scene) {
get_bounding_box(&scene_min,&scene_max);
scene_center.x = (scene_min.x + scene_max.x) / 2.0f;
scene_center.y = (scene_min.y + scene_max.y) / 2.0f;
scene_center.z = (scene_min.z + scene_max.z) / 2.0f;
return 0;
}
return 1;
@ -183,6 +315,7 @@ int loadasset (const char* path)
int main(int argc, char **argv)
{
struct aiLogStream stream;
glutInitWindowSize(900,600);
glutInitWindowPosition(100,100);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
@ -209,10 +342,22 @@ int main(int argc, char **argv)
}
}
glPolygonMode(GL_FRONT,GL_LINE);
glPolygonMode(GL_BACK,GL_LINE);
glClearColor(0.1f,0.1f,0.1f,1.f);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0); // Uses default lighting parameters
glEnable(GL_DEPTH_TEST);
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
glEnable(GL_NORMALIZE);
// XXX docs say all polygons are emitted CCW, but tests show that some aren't.
if(getenv("MODEL_IS_BROKEN"))
glFrontFace(GL_CW);
glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);
glutGet(GLUT_ELAPSED_TIME);
glutMainLoop();

2
samples/workspaces/vc8/SimpleOpenGL/SimpleOpenGL.vcproj
View File

@ -63,7 +63,7 @@
Name="VCLinkerTool"
AdditionalDependencies="glut32.lib assimp.lib"
LinkIncremental="2"
AdditionalLibraryDirectories="..\..\..\glut;&quot;..\..\..\..\lib\assimp_release-dll_win32&quot;"
AdditionalLibraryDirectories="..\..\..\glut;&quot;..\..\..\..\lib\assimp_debug_win32&quot;"
GenerateDebugInformation="true"
SubSystem="1"
TargetMachine="1"