comparison: src/mesh.c
src/mesh.c
- changeset 115
- e5f8c99b0987
- parent 106
- 895f92cff6b8
- child 116
- bfb2a7d62047
equal
deleted
inserted
replaced
| 114:5b91bbab1ac0 | 115:e5f8c99b0987 |
|---|---|
| 42 } | 42 } |
| 43 asc_error_catch_all_gl(); | 43 asc_error_catch_all_gl(); |
| 44 } | 44 } |
| 45 | 45 |
| 46 void asc_mesh_free_buffers(AscMesh *mesh, unsigned count) { | 46 void asc_mesh_free_buffers(AscMesh *mesh, unsigned count) { |
| 47 if (count == 1 && mesh->vbo == 0) return; // hack to skip this function until we remove it | |
| 47 asc_dprintf("Free mesh buffers for %u meshes.", count); | 48 asc_dprintf("Free mesh buffers for %u meshes.", count); |
| 48 GLuint buffers[count]; | 49 GLuint buffers[count]; |
| 49 GLuint arrays[count]; | 50 GLuint arrays[count]; |
| 50 | 51 |
| 51 for (unsigned i = 0; i < count; i++) { | 52 for (unsigned i = 0; i < count; i++) { |
| 58 glDeleteBuffers(count, buffers); | 59 glDeleteBuffers(count, buffers); |
| 59 glDeleteVertexArrays(count, arrays); | 60 glDeleteVertexArrays(count, arrays); |
| 60 asc_error_catch_all_gl(); | 61 asc_error_catch_all_gl(); |
| 61 } | 62 } |
| 62 | 63 |
| 63 void asc_mesh_draw_triangle_strip(AscMesh *mesh) { | 64 void asc_mesh_draw_triangle_strip(const AscMesh *mesh) { |
| 64 glBindVertexArray(mesh->vao); | 65 glBindVertexArray(mesh->vao); |
| 65 glDrawArrays(GL_TRIANGLE_STRIP, 0, mesh->vertices); | 66 glDrawArrays(GL_TRIANGLE_STRIP, 0, mesh->vtx_count); |
| 66 #ifndef NDEBUG | 67 #ifndef NDEBUG |
| 67 // only unbind in debug mode to detect accidental re-use of the wrong VAO | 68 // only unbind in debug mode to detect accidental re-use of the wrong VAO |
| 68 glBindVertexArray(0); | 69 glBindVertexArray(0); |
| 69 #endif | 70 #endif |
| 70 } | 71 } |
| 72 | |
| 73 void asc_mesh_destroy(AscMesh *mesh) { | |
| 74 asc_mesh_free_buffers(mesh, 1); | |
| 75 free(mesh->vtx_data); | |
| 76 } | |
| 77 | |
| 78 void asc_mesh_plane_2d(AscMesh *mesh) { | |
| 79 if (mesh->vbo == 0) { | |
| 80 asc_mesh_allocate_buffers(mesh, 1); | |
| 81 } | |
| 82 free(mesh->vtx_data); | |
| 83 asc_dprintf("Create plane in VBO %u and VAO %u", mesh->vbo, mesh->vao); | |
| 84 mesh->vtx_count = 4; | |
| 85 AscMeshVertex2d data[4] = { | |
| 86 { | |
| 87 .pos = {{0.0f, 0.0f}}, | |
| 88 .uv = {{0.0f, 0.0f}}, | |
| 89 } , // bottom left | |
| 90 { | |
| 91 .pos = {{0.0f, 1.0f}}, | |
| 92 .uv = {{0.0f, 1.0f}}, | |
| 93 }, // top left | |
| 94 { | |
| 95 .pos = {{1.0f, 0.0f}}, | |
| 96 .uv = {{1.0f, 0.0f}}, | |
| 97 }, // bottom right | |
| 98 { | |
| 99 .pos = {{1.0f, 1.0f}}, | |
| 100 .uv = {{1.0f, 1.0f}}, | |
| 101 } // top right | |
| 102 }; | |
| 103 mesh->vtx_data = malloc(sizeof(data)); | |
| 104 memcpy(mesh->vtx_data, data, sizeof(data)); | |
| 105 glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo); | |
| 106 glBufferData(GL_ARRAY_BUFFER, sizeof(data), mesh->vtx_data, GL_STATIC_DRAW); | |
| 107 glBindVertexArray(mesh->vao); | |
| 108 glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(AscMeshVertex2d), (void*)offsetof(AscMeshVertex2d, pos)); | |
| 109 glEnableVertexAttribArray(0); | |
| 110 glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(AscMeshVertex2d), (void*)offsetof(AscMeshVertex2d, uv)); | |
| 111 glEnableVertexAttribArray(1); | |
| 112 } |
