collada: animated book

Makefile

@@ -43,7 +43,8 @@ OBJS = \
 	src/collada/animate.o \
 	data/scenes/ship20/ship20.o \
 	data/scenes/noodle/noodle.o \
-	data/scenes/shadow_test/shadow_test.o
+	data/scenes/shadow_test/shadow_test.o \
+	data/scenes/book/book.o
 
 all: test.so
 

build_collada.sh

@@ -21,3 +21,15 @@ PYTHONPATH=~/d3d10 python -m collada.main \
 
 PYTHONPATH=~/d3d10 python -m collada.main \
                    include/data/scenes/shadow_test.h
+
+# book
+
+PYTHONPATH=~/d3d10 python -m collada.main \
+                   ~/Downloads/book.DAE \
+                   data/scenes/book/book.cpp \
+                   data/scenes/book/book.vtx \
+                   data/scenes/book/book.vjw \
+                   data/scenes/book/book.idx
+
+PYTHONPATH=~/d3d10 python -m collada.main \
+                   include/data/scenes/book.h

include/collada/types.h

@@ -260,6 +260,7 @@ namespace collada::types {
   struct skin {
     types::geometry const * const geometry; // source
 
+    matrix const bind_shape_matrix; // one per skin
     matrix const * const inverse_bind_matrices; // one per joint
 
     int const vertex_buffer_offset;

include/data/scenes/book.h

@@ -0,0 +1,3 @@
+namespace book {
+extern collada::types::descriptor const descriptor;
+}

src/collada/animate.cpp

@@ -7,27 +7,32 @@
 
 namespace collada::animate {
 
-  static inline int find_frame_ix(types::source const& source, float t)
+  struct frame_ix {
+    int f0;
+    int f1;
+  };
+
+  static inline frame_ix find_frame_ix(types::source const& source, float t)
   {
     for (int i = 0; i < source.count - 1; i++) {
       if (source.float_array[i] <= t && source.float_array[i+1] > t) {
-        return i;
+        return {i, i + 1};
       }
     }
-    return -1;
+    return {source.count - 1, 0};
   }
 
-  static inline float linear_interpolate_iv(types::source const& source, int frame_ix, float t)
+  static inline float linear_interpolate_iv(types::source const& source, frame_ix frame_ix, float t)
   {
-    float prev = source.float_array[(frame_ix+0) * source.stride];
+    float prev = source.float_array[(frame_ix.f0) * source.stride];
-    float next = source.float_array[(frame_ix+1) * source.stride];
+    float next = source.float_array[(frame_ix.f1) * source.stride];
     return (t - prev) / (next - prev);
   }
 
-  static inline float linear_interpolate_value(types::source const& source, int frame_ix, int parameter_ix, float iv)
+  static inline float linear_interpolate_value(types::source const& source, frame_ix frame_ix, int parameter_ix, float iv)
   {
-    float prev = source.float_array[(frame_ix+0) * source.stride + parameter_ix];
+    float prev = source.float_array[(frame_ix.f0) * source.stride + parameter_ix];
-    float next = source.float_array[(frame_ix+1) * source.stride + parameter_ix];
+    float next = source.float_array[(frame_ix.f1) * source.stride + parameter_ix];
     return prev + iv * (next - prev);
   }
 
@@ -88,7 +93,7 @@ namespace collada::animate {
     return (XMFLOAT2 const *)&source.float_array[ix];
   }
 
-  static float bezier_sampler(types::sampler const * const sampler, int frame_ix, int parameter_ix, float t)
+  static float bezier_sampler(types::sampler const * const sampler, frame_ix frame_ix, int parameter_ix, float t)
   {
     /*
       P0 is (INPUT[i] , OUTPUT[i])
@@ -97,15 +102,15 @@ namespace collada::animate {
       P1 is (INPUT[i+1], OUTPUT[i+1])
     */
 
-    float frame0_input = sampler->input.float_array[frame_ix+0];
+    float frame0_input = sampler->input.float_array[frame_ix.f0];
-    float frame1_input = sampler->input.float_array[frame_ix+1];
+    float frame1_input = sampler->input.float_array[frame_ix.f1];
 
-    float frame0_output = sampler->output.float_array[(frame_ix+0) * sampler->output.stride + parameter_ix];
+    float frame0_output = sampler->output.float_array[(frame_ix.f0) * sampler->output.stride + parameter_ix];
-    float frame1_output = sampler->output.float_array[(frame_ix+1) * sampler->output.stride + parameter_ix];
+    float frame1_output = sampler->output.float_array[(frame_ix.f1) * sampler->output.stride + parameter_ix];
 
     XMVECTOR p0 = XMVectorSet(frame0_input, frame0_output, 0, 0);
-    XMVECTOR c0 = XMLoadFloat2(tangent_index(sampler->out_tangent, frame_ix + 0, parameter_ix));
+    XMVECTOR c0 = XMLoadFloat2(tangent_index(sampler->out_tangent, frame_ix.f0, parameter_ix));
-    XMVECTOR c1 = XMLoadFloat2(tangent_index(sampler->in_tangent, frame_ix + 1, parameter_ix));
+    XMVECTOR c1 = XMLoadFloat2(tangent_index(sampler->in_tangent, frame_ix.f1, parameter_ix));
     XMVECTOR p1 = XMVectorSet(frame1_input, frame1_output, 0, 0);
 
     return bezier_binary_search(p0, c0, c1, p1, t);
@@ -153,7 +158,7 @@ namespace collada::animate {
 
   static void animate_channel_segment(types::channel const& channel,
                                       instance_types::transform& transform,
-                                      int frame_ix, float t)
+                                      frame_ix frame_ix, float t)
   {
     enum types::target_attribute const * target_attributes = &channel.target_attribute;
     int target_attributes_count = 1;
@@ -176,7 +181,7 @@ namespace collada::animate {
 
     for (int parameter_ix = 0; parameter_ix < target_attributes_count; parameter_ix++) {
 
-      enum types::interpolation interpolation = channel.source_sampler->interpolation.interpolation_array[frame_ix];
+      enum types::interpolation interpolation = channel.source_sampler->interpolation.interpolation_array[frame_ix.f0];
 
       float value;
       if (interpolation == types::interpolation::BEZIER) {
@@ -196,8 +201,8 @@ namespace collada::animate {
       types::channel const& channel = *node_instance.node->channels[i];
       instance_types::transform& transform = node_instance.transforms[channel.target_transform_index];
 
-      int frame_ix = find_frame_ix(channel.source_sampler->input, t);
+      frame_ix frame_ix = find_frame_ix(channel.source_sampler->input, t);
-      assert(frame_ix >= 0); // animation is missing a key frame
+      //assert(frame_ix >= 0); // animation is missing a key frame
 
       animate_channel_segment(channel, transform, frame_ix, t);
     }

src/collada/scene.cpp

@@ -450,6 +450,8 @@ namespace collada::scene {
       types::instance_controller const &instance_controller = instance_controllers[i];
       types::skin const &skin = instance_controller.controller->skin;
 
+      XMMATRIX bsm = XMLoadFloat4x4((XMFLOAT4X4*)&skin.bind_shape_matrix);
+
       XMFLOAT4X4 joints[instance_controller.joint_count];
       int joints_size = (sizeof (joints));
       for (int joint_index = 0; joint_index < instance_controller.joint_count; joint_index++) {
@@ -457,7 +459,7 @@ namespace collada::scene {
         int node_index = instance_controller.joint_node_indices[joint_index];
         instance_types::node& node_instance = node_state.node_instances[node_index];
 
-        XMStoreFloat4x4(&joints[joint_index], ibm * node_instance.world);
+        XMStoreFloat4x4(&joints[joint_index], bsm * ibm * node_instance.world);
       }
       glBindBuffer(GL_UNIFORM_BUFFER, joint_uniform_buffer);
       glBufferData(GL_UNIFORM_BUFFER, joints_size, (void *)&joints[0], GL_DYNAMIC_DRAW);
@@ -520,7 +522,7 @@ namespace collada::scene {
 
   void state::update(float t)
   {
-    t = animate::loop(t / 4.0f, 3.333333f);
+    t = animate::loop(t / 4.0f, 1.8333333333333333f);
 
     for (int i = 0; i < descriptor->nodes_count; i++) {
       animate::animate_node(node_state.node_instances[i], t);

src/test.cpp

@@ -29,6 +29,7 @@
 #include "data/scenes/ship20.h"
 #include "data/scenes/noodle.h"
 #include "data/scenes/shadow_test.h"
+#include "data/scenes/book.h"
 
 struct line_location {
   struct {
@@ -309,11 +310,13 @@ void load(const char * source_path)
   //////////////////////////////////////////////////////////////////////
 
   collada::effect::load_effects();
-  scene_state.load_scene(&noodle::descriptor);
+  scene_state.load_scene(&book::descriptor);
-  node_eye = scene_state.find_node_by_name("Camera001");
+  node_eye = scene_state.find_node_by_name("Camera");
   assert(node_eye != nullptr);
-  node_at = scene_state.find_node_by_name("Camera001.Target");
+  //view::state.eye = XMVector3Transform(XMVectorZero(), node_eye->world);
-  assert(node_at != nullptr);
+
+  //node_at = scene_state.find_node_by_name("Camera001.Target");
+  //assert(node_at != nullptr);
 }
 
 void update_keyboard(int up, int down, int left, int right,
@@ -453,8 +456,13 @@ void update(float time)
   current_time = time;
 
   scene_state.update(time);
+  /*
   view::state.eye = XMVector3Transform(XMVectorZero(), node_eye->world);
-  view::state.at = XMVector3Transform(XMVectorZero(), node_at->world);
+  if (node_at == nullptr)
+    view::state.at = XMVectorZero();
+  else
+    view::state.at = XMVector3Transform(XMVectorZero(), node_at->world);
+  */
 
   view::update_transforms();
 }

src/view.cpp

@@ -107,6 +107,6 @@ namespace view {
     //state.eye = XMVectorSet(-45.5f, 43.25f, 63.0f, 1);
     //state.at = state.eye + state.direction * at_distance;
     state.at = XMVectorSet(0, 0, 0, 1);
-    state.eye = XMVectorSet(0, -10, 0, 1);
+    state.eye = XMVectorSet(0, -100, 0, 1);
   }
 }