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Added flag to flip vertex position y coordinates

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This commit is contained in:
Sascha Willems 2020-04-25 12:01:21 +02:00
parent 5df36d7b19
commit 7b46e71f33
1 changed files with 8 additions and 2 deletions
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10
base/VulkanglTFModel.hpp
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@ -541,7 +541,8 @@ namespace vkglTF
typedef enum FileLoadingFlags { typedef enum FileLoadingFlags {
None = 0, None = 0,
PreTransformVertices = 1, PreTransformVertices = 1,
PreMultiplyVertexColors = 2 PreMultiplyVertexColors = 2,
FlipY = 3
}; };
/* /*
@ -1042,9 +1043,10 @@ namespace vkglTF
} }
// Pre-Calculations for requested features // Pre-Calculations for requested features
if ((fileLoadingFlags & FileLoadingFlags::PreTransformVertices) || (fileLoadingFlags & FileLoadingFlags::PreMultiplyVertexColors)) { if ((fileLoadingFlags & FileLoadingFlags::PreTransformVertices) || (fileLoadingFlags & FileLoadingFlags::PreMultiplyVertexColors) || (fileLoadingFlags & FileLoadingFlags::FlipY)) {
const bool preTransform = fileLoadingFlags & FileLoadingFlags::PreTransformVertices; const bool preTransform = fileLoadingFlags & FileLoadingFlags::PreTransformVertices;
const bool preMultiplyColor = fileLoadingFlags & FileLoadingFlags::PreMultiplyVertexColors; const bool preMultiplyColor = fileLoadingFlags & FileLoadingFlags::PreMultiplyVertexColors;
const bool flipY = fileLoadingFlags & FileLoadingFlags::FlipY;
for (Node* node : linearNodes) { for (Node* node : linearNodes) {
if (node->mesh) { if (node->mesh) {
const glm::mat4 localMatrix = node->getMatrix(); const glm::mat4 localMatrix = node->getMatrix();
@ -1055,6 +1057,10 @@ namespace vkglTF
if (preTransform) { if (preTransform) {
vertex.pos = glm::vec3(localMatrix * glm::vec4(vertex.pos, 1.0f)); vertex.pos = glm::vec3(localMatrix * glm::vec4(vertex.pos, 1.0f));
} }
// Flip Y-Axis of vertex positions
if (preTransform) {
vertex.pos.y *= -1.0f;
}
// Pre-Multiply vertex colors with material base color // Pre-Multiply vertex colors with material base color
if (preMultiplyColor) { if (preMultiplyColor) {
vertex.color = primitive->material.baseColorFactor * vertex.color; vertex.color = primitive->material.baseColorFactor * vertex.color;