Simple software rasterizer with OpenGL-like interface. It's neither fast nor good, created for learning purposes. Inspired by this article: https://web.archive.org/web/20180129085015/http://forum.devmaster.net/t/advanced-rasterization/6145
- Full Application: https://bitbucket.org/Apfel1994/swdemo
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swUseProgram(program);
swBindBuffer(SW_ARRAY_BUFFER, attribs_buf_id);
swBindBuffer(SW_INDEX_BUFFER, indices_buf_id);
swSetUniform(U_MVP, SW_MAT4, &mvp_mat[0][0]);
constint stride = sizeof(float) * 8;
swVertexAttribPointer(A_POS, 3 * sizeof(float), (SWuint)stride, (void *)0);
swVertexAttribPointer(A_UVS, 2 * sizeof(float), (SWuint)stride, (void *)(6 * sizeof(float)));
swDrawElements(SW_TRIANGLE_STRIP, (SWuint)num_indices, SW_UNSIGNED_SHORT, (void *)uintptr_t(offset));enum { A_POS,
A_UVS };
enum { V_UVS };
enum { U_MVP,
U_AMBIENT };
VSHADERenvironment_vs(VS_IN, VS_OUT) {
usingnamespaceglm;
*(vec2 *)V_FVARYING(V_UVS) = make_vec2(V_FATTR(A_UVS));
*(vec4 *)V_POS_OUT = make_mat4(F_UNIFORM(U_MVP)) * vec4(make_vec3(V_FATTR(A_POS)), 1);
}
FSHADERenvironment_fs(FS_IN, FS_OUT) {
usingnamespaceglm;const vec4 &fl = make_vec4(F_UNIFORM(U_FLASHLIGHT_POS));
TEXTURE(DIFFUSEMAP_SLOT, F_FVARYING_IN(V_UVS), F_COL_OUT);
*(vec3 *) F_COL_OUT *= make_vec3(F_UNIFORM(U_AMBIENT));
}
...
SWint program = swCreateProgram();
swUseProgram(p);
swInitProgram(environment_vs, environment_fs, 2);
swRegisterUniformv(U_MVP, SW_MAT4, 1);
swRegisterUniformv(U_AMBIENT, SW_VEC3, 1);