void PezUpdate(unsigned int elapsedMicroseconds)
{
const float RadiansPerMicrosecond = 0.0000005f;
static float Theta = 0;
Theta += elapsedMicroseconds * RadiansPerMicrosecond;
Vector3 offset = V3MakeFromElems(0, 0, 0);
Matrix4 model = M4MakeRotationZ(Theta);
model = M4Mul(M4MakeTranslation(offset), model);
model = M4Mul(model, M4MakeTranslation(V3Neg(offset)));
Point3 eyePosition = P3MakeFromElems(0, 10, 0);
Point3 targetPosition = P3MakeFromElems(0, 0, 0);
Vector3 upVector = V3MakeFromElems(0, 0, 1);
Matrix4 view = M4MakeLookAt(eyePosition, targetPosition, upVector);
ModelviewMatrix = M4Mul(view, model);
}
void PezUpdate(float seconds)
{
// Create the model-view matrix:
Point3 eye = P3MakeFromElems(EyeVector[0] * EyeScale, EyeVector[1] * EyeScale, EyeVector[2] * EyeScale);
Point3 target = P3MakeFromElems(TargetVector[0] * TargetScale, TargetVector[1] * TargetScale, TargetVector[2] * TargetScale);
Vector3 up = V3MakeFromElems(0, 1, 0);
Scene.ViewMatrix = M4MakeLookAt(eye, target, up);
PezConfig cfg = PezGetConfig();
const float h = 5.0f;
const float w = h * cfg.Width / cfg.Height;
const float hither = 5;
const float yon = 200;
Scene.Projection = M4MakeFrustum(-w, w, -h, h, hither, yon);
}
void draw()
{
int mesh = 0, multi = 0, meshcolor = 0;
switch (state) {
case STATE_GRAY_SOURCE:
parg_shader_bind(P_GRAY);
parg_texture_bind(graytex, 0);
parg_uniform1f(U_ZSCALE, 1);
break;
case STATE_COLOR_IH:
mesh = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 0.3);
break;
case STATE_COLOR_DHSCSI:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 0.3);
break;
case STATE_MULTI_RGBA:
case STATE_MULTI_RGB:
case STATE_MULTI_DIAGRAM:
meshcolor = mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 0.25);
break;
case STATE_COLOR_DEFAULT:
case STATE_GRAY_DEFAULT:
case STATE_GRAY_SIMPLIFY:
case STATE_GRAY_INVERT:
case STATE_GRAY_HEIGHTS:
mesh = 1;
parg_shader_bind(P_GRAYMESH);
parg_uniform1f(U_ZSCALE, 1);
break;
case STATE_GRAY_MULTI:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_texture_bind(colortex, 0);
parg_uniform1f(U_ZSCALE, 0.3);
break;
case STATE_GRAY_DUAL:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_texture_bind(colortex, 0);
parg_uniform1f(U_ZSCALE, 1);
break;
case STATE_GRAY_DHS:
case STATE_GRAY_DHSC:
mesh = multi = 1;
parg_shader_bind(P_GRAYMESH);
parg_texture_bind(colortex, 0);
parg_uniform1f(U_ZSCALE, 0.5);
break;
case STATE_COLOR_SOURCE:
parg_texture_bind(colortex, 0);
parg_shader_bind(P_COLOR);
parg_uniform1f(U_ZSCALE, 1);
break;
default:
break;
}
if (mesh) {
for (int i = 0; i < sizeof(trimesh) / sizeof(trimesh[0]); i++) {
parg_mesh_free(trimesh[i]);
}
memset(trimesh, 0, sizeof(trimesh));
create_mesh();
}
Matrix4 model;
if (mesh) {
model = M4MakeScale(V3MakeFromElems(20, 20, 10));
model = M4Mul(M4MakeTranslation(V3MakeFromElems(-10, -10, 0)), model);
} else {
model = M4MakeIdentity();
}
Matrix4 modelview = M4Mul(view, model);
Matrix4 mvp = M4Mul(projection, modelview);
parg_uniform_matrix4f(U_MVP, &mvp);
parg_draw_clear();
if (mesh) {
Vector4 colors[3];
colors[0] = (Vector4){0, 0.6, 0.9, 1};
colors[1] = (Vector4){0, 0.9, 0.6, 1};
colors[2] = (Vector4){0.9, 0.6, 0, 1};
Vector4 black = {0, 0, 0, 1.0};
for (int imesh = 0; imesh < nmeshes; imesh++) {
parg_varray_enable(parg_mesh_coord(trimesh[imesh]), A_POSITION, 3,
PARG_FLOAT, 0, 0);
parg_varray_bind(parg_mesh_index(trimesh[imesh]));
if (meshcolor) {
unsigned int b = meshcolors[imesh] & 0xff;
unsigned int g = (meshcolors[imesh] >> 8) & 0xff;
unsigned int r = (meshcolors[imesh] >> 16) & 0xff;
unsigned int a = (meshcolors[imesh] >> 24) & 0xff;
Vector4 color;
color.x = r / 255.0f;
color.y = g / 255.0f;
color.z = b / 255.0f;
color.w = a / 255.0f;
parg_uniform4f(U_COLOR, &color);
} else {
parg_uniform4f(U_COLOR, &colors[imesh]);
}
parg_draw_triangles_u16(0, parg_mesh_ntriangles(trimesh[imesh]));
parg_uniform4f(U_COLOR, &black);
parg_draw_wireframe_triangles_u16(
0, parg_mesh_ntriangles(trimesh[imesh]));
}
} else {
static float Tesselation = 0.0;
static float Wireframe = 0.0;
static float Tagg = 0.0;
static float ColNorm = 0.0;
static float DCol = 0.0;
// storage
std::vector<float> Verts;
std::vector<float> Faces;
int nv;
// Camera information
Point3 eyePosition = P3MakeFromElems(0, 0, -10);
Point3 targetPosition = P3MakeFromElems(0, 0, 1.0);
Vector3 upVector = V3MakeFromElems(0, 1, 0);
float camAngleX=0.0f, camAngleY=0.0f; // camera angles
// Button information
float mouseSensitivy = 0.001f;
bool b_r = false;
int mouseButton = 0;
int mouseX = 0;
int mouseY = 0;
// selection
int selID = 0;
void PezRender(GLuint fbo)
{