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Improvement to bone link rendering when bones are large.

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This commit is contained in:
Anthony J. Thibault 2015-08-27 10:21:23 -07:00
parent a04f356857
commit 778521f664
1 changed files with 45 additions and 25 deletions
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70
libraries/render-utils/src/AnimDebugDraw.cpp
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@ -250,34 +250,54 @@ static void addLink(const AnimPose& rootPose, const AnimPose& pose,
glm::vec3 boneAxis0 = glm::normalize(pose0.inverse().xformVector(boneAxisWorld));
glm::vec3 boneAxis1 = glm::normalize(pose1.inverse().xformVector(boneAxisWorld));
glm::vec3 uAxis, vAxis, wAxis;
generateBasisVectors(boneAxis0, glm::vec3(1, 0, 0), uAxis, vAxis, wAxis);
const int NUM_BASE_CORNERS = 4;
glm::vec3 boneBaseCorners[NUM_BASE_CORNERS];
boneBaseCorners[0] = pose0 * ((uAxis * radius) + (vAxis * radius) + (wAxis * radius));
boneBaseCorners[1] = pose0 * ((uAxis * radius) - (vAxis * radius) + (wAxis * radius));
boneBaseCorners[2] = pose0 * ((uAxis * radius) - (vAxis * radius) - (wAxis * radius));
boneBaseCorners[3] = pose0 * ((uAxis * radius) + (vAxis * radius) - (wAxis * radius));
glm::vec3 boneBase = pose0 * (boneAxis0 * radius);
glm::vec3 boneTip = pose1 * (boneAxis1 * -radius);
for (int i = 0; i < NUM_BASE_CORNERS; i++) {
v->pos = boneBaseCorners[i];
v->rgba = cyan;
v++;
v->pos = boneBaseCorners[(i + 1) % NUM_BASE_CORNERS];
v->rgba = cyan;
v++;
}
const int NUM_BASE_CORNERS = 4;
for (int i = 0; i < NUM_BASE_CORNERS; i++) {
v->pos = boneBaseCorners[i];
v->rgba = cyan;
v++;
v->pos = boneTip;
v->rgba = cyan;
v++;
// make sure there's room between the two bones to draw a nice bone link.
if (glm::dot(boneTip - pose0.trans, boneAxisWorld) > glm::dot(boneBase - pose0.trans, boneAxisWorld)) {
// there is room, so lets draw a nice bone
glm::vec3 uAxis, vAxis, wAxis;
generateBasisVectors(boneAxis0, glm::vec3(1, 0, 0), uAxis, vAxis, wAxis);
glm::vec3 boneBaseCorners[NUM_BASE_CORNERS];
boneBaseCorners[0] = pose0 * ((uAxis * radius) + (vAxis * radius) + (wAxis * radius));
boneBaseCorners[1] = pose0 * ((uAxis * radius) - (vAxis * radius) + (wAxis * radius));
boneBaseCorners[2] = pose0 * ((uAxis * radius) - (vAxis * radius) - (wAxis * radius));
boneBaseCorners[3] = pose0 * ((uAxis * radius) + (vAxis * radius) - (wAxis * radius));
for (int i = 0; i < NUM_BASE_CORNERS; i++) {
v->pos = boneBaseCorners[i];
v->rgba = cyan;
v++;
v->pos = boneBaseCorners[(i + 1) % NUM_BASE_CORNERS];
v->rgba = cyan;
v++;
}
for (int i = 0; i < NUM_BASE_CORNERS; i++) {
v->pos = boneBaseCorners[i];
v->rgba = cyan;
v++;
v->pos = boneTip;
v->rgba = cyan;
v++;
}
} else {
// There's no room between the bones to draw the link.
// just draw a line between the two bone centers.
// We add the same line multiple times, so the vertex count is correct.
for (int i = 0; i < NUM_BASE_CORNERS * 2; i++) {
v->pos = pose0.trans;
v->rgba = cyan;
v++;
v->pos = pose1.trans;
v->rgba = cyan;
v++;
}
}
}