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Diffstat (limited to 'test/demo_utils.h')
| -rw-r--r-- | test/demo_utils.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/test/demo_utils.h b/test/demo_utils.h new file mode 100644 index 0000000..94be68e --- /dev/null +++ b/test/demo_utils.h @@ -0,0 +1,170 @@ +/* + Copyright 2012-2019 David Robillard <http://drobilla.net> + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies. + + THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +#include "pugl/pugl.h" + +#include <math.h> +#include <stdint.h> +#include <stdio.h> +#include <string.h> + +typedef struct { + double lastReportTime; +} PuglFpsPrinter; + +typedef float vec4[4]; +typedef vec4 mat4[4]; + +// clang-format off + +static const float cubeStripVertices[] = { + -1.0f, 1.0f, 1.0f, // Front top left + 1.0f, 1.0f, 1.0f, // Front top right + -1.0f, -1.0f, 1.0f, // Front bottom left + 1.0f, -1.0f, 1.0f, // Front bottom right + 1.0f, -1.0f, -1.0f, // Back bottom right + 1.0f, 1.0f, 1.0f, // Front top right + 1.0f, 1.0f, -1.0f, // Back top right + -1.0f, 1.0f, 1.0f, // Front top left + -1.0f, 1.0f, -1.0f, // Back top left + -1.0f, -1.0f, 1.0f, // Front bottom left + -1.0f, -1.0f, -1.0f, // Back bottom left + 1.0f, -1.0f, -1.0f, // Back bottom right + -1.0f, 1.0f, -1.0f, // Back top left + 1.0f, 1.0f, -1.0f // Back top right +}; + +static const float cubeFrontLineLoop[] = { + -1.0f, 1.0f, 1.0f, // Front top left + 1.0f, 1.0f, 1.0f, // Front top right + 1.0f, -1.0f, 1.0f, // Front bottom right + -1.0f, -1.0f, 1.0f, // Front bottom left +}; + +static const float cubeBackLineLoop[] = { + -1.0f, 1.0f, -1.0f, // Back top left + 1.0f, 1.0f, -1.0f, // Back top right + 1.0f, -1.0f, -1.0f, // Back bottom right + -1.0f, -1.0f, -1.0f, // Back bottom left +}; + +static const float cubeSideLines[] = { + -1.0f, 1.0f, 1.0f, // Front top left + -1.0f, 1.0f, -1.0f, // Back top left + + -1.0f, -1.0f, 1.0f, // Front bottom left + -1.0f, -1.0f, -1.0f, // Back bottom left + + 1.0f, 1.0f, 1.0f, // Front top right + 1.0f, 1.0f, -1.0f, // Back top right + + 1.0f, -1.0f, 1.0f, // Front bottom right + 1.0f, -1.0f, -1.0f, // Back bottom right +}; + +// clang-format on + +static inline void +mat4Identity(mat4 m) +{ + for (int c = 0; c < 4; ++c) { + for (int r = 0; r < 4; ++r) { + m[c][r] = c == r ? 1.0f : 0.0f; + } + } +} + +static inline void +mat4Translate(mat4 m, const float x, const float y, const float z) +{ + m[3][0] = x; + m[3][1] = y; + m[3][2] = z; +} + +static inline void +mat4Mul(mat4 m, mat4 a, mat4 b) +{ + for (int c = 0; c < 4; ++c) { + for (int r = 0; r < 4; ++r) { + m[c][r] = 0.0f; + for (int k = 0; k < 4; ++k) { + m[c][r] += a[k][r] * b[c][k]; + } + } + } +} + +static inline void +mat4Ortho(mat4 m, + const float l, + const float r, + const float b, + const float t, + const float n, + const float f) +{ + m[0][0] = 2.0f / (r - l); + m[0][1] = m[0][2] = m[0][3] = 0.0f; + + m[1][1] = 2.0f / (t - b); + m[1][0] = m[1][2] = m[1][3] = 0.0f; + + m[2][2] = -2.0f / (f - n); + m[2][0] = m[2][1] = m[2][3] = 0.0f; + + m[3][0] = -(r + l) / (r - l); + m[3][1] = -(t + b) / (t - b); + m[3][2] = -(f + n) / (f - n); + m[3][3] = 1.0f; +} + +/** Calculate a projection matrix for a given perspective. */ +static inline void +perspective(float* m, float fov, float aspect, float zNear, float zFar) +{ + const float h = tanf(fov); + const float w = h / aspect; + const float depth = zNear - zFar; + const float q = (zFar + zNear) / depth; + const float qn = 2 * zFar * zNear / depth; + + // clang-format off + m[0] = w; m[1] = 0; m[2] = 0; m[3] = 0; + m[4] = 0; m[5] = h; m[6] = 0; m[7] = 0; + m[8] = 0; m[9] = 0; m[10] = q; m[11] = -1; + m[12] = 0; m[13] = 0; m[14] = qn; m[15] = 0; + // clang-format on +} + +static inline void +puglPrintFps(const PuglWorld* world, + PuglFpsPrinter* printer, + unsigned* const framesDrawn) +{ + const double thisTime = puglGetTime(world); + if (thisTime > printer->lastReportTime + 5) { + const double fps = *framesDrawn / (thisTime - printer->lastReportTime); + fprintf(stderr, + "%u frames in %.0f seconds = %.3f FPS\n", + *framesDrawn, + thisTime - printer->lastReportTime, + fps); + + printer->lastReportTime = thisTime; + *framesDrawn = 0; + } +} |