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Reimplementation of LineStrip primitive using DYNAMIC vertext array and

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triangle strips (basic mesh).
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brunoherbelin
2021-02-26 17:01:24 +01:00
parent afc0c7af0e
commit f7b93478ed
4 changed files with 172 additions and 91 deletions
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6
Scene.cpp
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@@ -111,14 +111,14 @@ void Primitive::init()
glGenBuffers( 1, &elementBuffer_);
glBindVertexArray( vao_ );
// compute the memory needs for points normals and indicies
// compute the memory needs for points
std::size_t sizeofPoints = sizeof(glm::vec3) * points_.size();
std::size_t sizeofColors = sizeof(glm::vec4) * colors_.size();
std::size_t sizeofTexCoords = sizeof(glm::vec2) * texCoords_.size();
// setup the array buffers for vertices
glBindBuffer( GL_ARRAY_BUFFER, arrayBuffer_ );
glBufferData(GL_ARRAY_BUFFER, sizeofPoints + sizeofColors + sizeofTexCoords, NULL, GL_STATIC_DRAW);
glBufferData( GL_ARRAY_BUFFER, sizeofPoints + sizeofColors + sizeofTexCoords, NULL, GL_STATIC_DRAW);
glBufferSubData( GL_ARRAY_BUFFER, 0, sizeofPoints, &points_[0] );
glBufferSubData( GL_ARRAY_BUFFER, sizeofPoints, sizeofColors, &colors_[0] );
if ( sizeofTexCoords )
@@ -126,7 +126,7 @@ void Primitive::init()
// setup the element array for the triangle indices
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elementBuffer_);
int sizeofIndices = indices_.size()*sizeof(uint);
std::size_t sizeofIndices = indices_.size() * sizeof(uint);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeofIndices, &(indices_[0]), GL_STATIC_DRAW);
// explain how to read attributes 0, 1 and 2 (for point, color and textcoord respectively)